You landed in the US, scanned the QR code, and… nothing happens. Your eSIM doesn’t work. Don’t panic. Most activation issues are straightforward to fix, and the solution is usually simpler than you think.

This guide covers the most common USA eSIM problems and how to fix them, step by step. Try the fixes in order — the quickest solutions are first. If you haven’t installed your eSIM yet and just need the setup instructions, the USA eSIM setup guide has you covered. For issues that require changing your dual SIM configuration, the USA eSIM dual SIM setup guide walks through the settings.

Quick fixes for USA eSIM not working after arrival

If your USA eSIM is not working after arrival, try these four things first. Most problems are solved by one of them.

1. Turn on data roaming. This is the single most common issue. Travel eSIMs require data roaming to function. Go to Settings → Cellular/Mobile Data → tap your eSIM line → turn Data Roaming ON. On Android: Settings → Network & Internet → SIMs → tap the eSIM → enable Data Roaming.

2. Toggle airplane mode. Turn airplane mode ON for 10 seconds, then OFF. This forces your phone to reconnect to the network. It works more often than you’d think.

3. Restart your phone. A full restart refreshes the network connection. Do this before trying anything more complicated.

4. Manually select a network. Go to Settings → Cellular → Network Selection → turn OFF Automatic → wait for the list of networks to appear → try T-Mobile, AT&T, and Verizon one at a time. On Android: Settings → Network & Internet → Mobile Network → Network Operators.

Apple’s iPhone eSIM support page covers device-specific troubleshooting for iOS users who are still having issues after trying the steps above. Google’s Pixel eSIM support page has similar guidance for Android users. If none of these quick fixes help, move to the specific problem sections below.

USA eSIM not working after arrival — Step by step

When you land in the US and your USA eSIM is not working after arrival, follow this sequence:

Step 1: Check data roaming status. Go to Settings → Cellular → tap your eSIM line. Data Roaming must be ON. This is the most common reason for failure.

Step 2: Toggle airplane mode. Turn airplane mode ON, wait 10 seconds, turn OFF.

Step 3: Check APN settings. If you have signal bars but no internet, APN is likely the issue. See the APN section below.

Step 4: Manually select network. Turn off automatic network selection and try T-Mobile, AT&T, and Verizon one by one.

Step 5: Restart your phone. A full restart often resolves connection issues.

Step 6: Check carrier lock status. If none of the above works, your phone may be carrier-locked. Contact your home carrier to confirm.

If you’re using a provider with automatic network switching, USA eSIM can sometimes resolve manual selection issues by connecting to the strongest carrier automatically. If you’re still stuck after trying these steps, the USA eSIM complete guide has additional context on how providers connect to US networks.

USA eSIM no signal troubleshooting

USA eSIM no signal troubleshooting — if you see “No Signal,” “No Service,” or “SOS Only,” here’s what to check:

Symptom	Likely cause	Fix
No bars at all	Network not selected	Manual network selection → choose T-Mobile/AT&T/Verizon
“SOS Only”	No network registration	Toggle airplane mode, restart, try manual selection
Bars but no data	APN missing	Enter APN from the setup guide
Intermittent signal	Location dead zone	Move to higher ground or closer to town
No signal inside buildings	Building penetration	Go near a window or outside

If you have no signal at all: First, toggle airplane mode. If that doesn’t work, restart your phone. If you still see no signal, go to Settings → Cellular → Network Selection → turn off Automatic → wait for the list of networks → try T-Mobile, AT&T, and Verizon.

Why does my eSIM show no service in USA? The most common reasons are: data roaming is OFF, you’re in a dead zone, your phone is carrier-locked, or the eSIM profile hasn’t been properly installed. Try the fixes above in order. For a broader overview of which networks work where, the USA eSIM coverage guide has detailed maps and signal strength data.

USA eSIM data roaming not working

USA eSIM data roaming not working is the most frequent complaint. The fix is usually simple:

On iPhone:

Settings → Cellular → tap your eSIM line
Ensure Data Roaming is ON (green/blue)
If it’s ON and still not working, toggle it OFF → wait 5 seconds → ON again
Restart your phone

On Android:

Settings → Network & Internet → SIMs → tap your eSIM
Ensure Data Roaming is ON
Toggle it off and on again
Restart your phone

Why does this happen? Travel eSIMs are technically roaming connections on US networks. Without data roaming enabled, your phone blocks the connection. The setting is safe to enable because you’re using a local data plan, not your home carrier’s international roaming.

If your data is still not working, the USA eSIM provider comparison includes information on which providers have the most reliable network connections in different parts of the country.

USA eSIM slow data speed fix

If your USA eSIM data is slow, here’s how to fix USA eSIM slow data speed:

Try switching networks: Go to Settings → Cellular → Network Selection → turn OFF Automatic → try T-Mobile, AT&T, and Verizon. One may be faster in your current location.

Check network congestion: Peak hours (12-2 PM, 6-8 PM) can slow speeds in busy areas. Speed usually improves outside these hours.

Check your plan cap: If you’re on an “unlimited” plan, check the fair usage policy. Some plans throttle after 2-5GB per day or 25-60GB total.

Switch from 5G to LTE: 5G can be slower in some areas. Go to Settings → Cellular → Voice & Data → select LTE instead of 5G.

Restart your phone: A simple restart can reset network connections.

Check signal strength: Fewer bars means slower speeds. Move closer to a window or outside.

USA eSIM not connecting to network

If your USA eSIM is not connecting to network, try these steps:

Toggle airplane mode ON for 10 seconds, then OFF. This forces the phone to search for available networks.

Manual network selection: Settings → Cellular → Network Selection → turn OFF Automatic → try each carrier.

Check carrier lock: If you’ve tried everything and the phone still won’t connect, contact your home carrier to confirm the phone is unlocked.

Check APN settings: If you have signal but no data, APN is the issue.

USA eSIM APN settings not working

If your USA eSIM APN settings are not working, here’s how to fix it:

Provider	APN	Username	Password
Airalo	`airalovpn`	(blank)	(blank)
Airalo (alternate)	`airaloglobal`	(blank)	(blank)
Holafly	`holafly`	(blank)	(blank)
Ubigi	`ubigi`	(blank)	(blank)
Nomad	`nomad`	(blank)	(blank)
Saily	`saily`	(blank)	(blank)
Tello	auto-configured	—	—
T-Mobile Prepaid	`fast.t-mobile.com`	(blank)	(blank)
AT&T Prepaid	`nextgenphone`	(blank)	(blank)
Verizon Prepaid	`vzwinternet`	(blank)	(blank)
Roami	auto-configured	—	—

To set APN on iPhone: Settings → Cellular → tap the eSIM line → Cellular Data Network → enter the APN value → save → restart.

To set APN on Android: Settings → Connections → Mobile Networks → Access Point Names → Add new APN → enter the APN → save → select → restart.

If APN values still don’t work: Reset APN to default first. On iPhone, go to Settings → Cellular → Cellular Data Network → Reset. On Samsung, go to Settings → Connections → Mobile Networks → Access Point Names → Reset to default. Then re-enter the values and restart.

Some providers auto-configure APN. Ubigi, Tello, and Roami set APN automatically when you install the eSIM. Manual entry is usually only needed if auto-configuration fails. For a complete reference of APN settings across all providers, the USA eSIM price guide includes APN information alongside plan details.

USA eSIM activation failed error code

USA eSIM activation failed error code — here’s what to do when you see an activation error:

Error message	Likely cause	Fix
“Activation failed”	Attempting to activate outside US	Try again after landing
“Unable to add eSIM”	Carrier lock or incompatible device	Check EID via `*#06#`
“Invalid QR code”	QR code expired or already used	Contact provider for replacement
“Connection lost”	Poor internet during installation	Try again on stable WiFi
“Profile not supported”	Device not compatible	Check EID number

If activation failed and you’re already in the US: Check APN settings, ensure data roaming is ON, and manually select a network. If the error persists, contact the provider’s support before deleting the profile.

If you haven’t arrived yet: Some eSIMs require a US network connection to complete activation. Wait until you land, then try again.

USA eSIM stuck on activating

If your USA eSIM is stuck on activating, here’s what to do:

Wait 15-20 minutes. Some eSIMs take longer on the first activation. If it’s still stuck after 30 minutes, restart your phone.

Toggle data roaming. Go to Settings → Cellular → tap the eSIM line → turn Data Roaming OFF → wait 10 seconds → ON again.

Don’t delete the profile. It may activate on its own once the phone reconnects. Only delete after contacting support.

USA eSIM QR code not scanning

If your USA eSIM QR code is not scanning, try these fixes:

Take a screenshot. Screenshot the QR code and try scanning from the screenshot. This often works when the original code is small or damaged.

Try better lighting. QR code scanning requires good lighting. Move to a brighter area.

Use manual entry. Look for “Enter Details Manually” in your eSIM settings. The SM-DP+ address and activation code are in your confirmation email.

Try a different device. If possible, scan the QR code from a different phone and send the profile to your phone (some providers support this).

Contact support. If none of these work, the QR code may be expired or corrupted. Request a replacement.

USA eSIM dual SIM conflict with home SIM

USA eSIM dual SIM conflict with home SIM — here’s how to fix it:

Data line is wrong. Settings → Cellular → Cellular Data → make sure your USA eSIM is selected. If your home SIM is selected, you’ll be charged international roaming by your home carrier.

Voice line is wrong. Settings → Cellular → Default Voice Line → select your home SIM. The eSIM is for data only.

Home SIM not receiving SMS. Check that your home SIM is enabled (not turned off) and has data roaming OFF (to prevent charges). It should still receive calls and SMS.

“No SIM” or “SOS Only” error. Toggle airplane mode, restart, and try manual network selection. If the problem persists, your phone may be carrier-locked.

For a complete walkthrough of setting up two lines correctly, the USA eSIM dual SIM setup guide covers the configuration for both iPhone and Android. If you’re using a provider that automatically switches networks, USA eSIM can reduce conflicts by connecting to the strongest available carrier.

USA eSIM emergency calls only fix

USA eSIM emergency calls only fix — if your phone shows “Emergency Calls Only” or “SOS Only”:

What it means: Your phone isn’t registered on any mobile network. It can only make emergency calls.

Fix it:

Toggle airplane mode ON → wait 10 seconds → OFF
Restart your phone
Try manual network selection (Settings → Cellular → Network Selection → try each carrier)
Check if your phone is carrier-locked (contact your home carrier)
If you’re in a remote area, move to higher ground or closer to town

Why does this happen? The most common reasons are: you’re in a dead zone, your phone is carrier-locked, or the eSIM profile hasn’t fully activated. Try the fixes above.

My phone says emergency calls only with eSIM in USA — this is usually a temporary network registration issue. Toggle airplane mode and restart. If the problem persists for more than 15 minutes, contact your provider’s support.

USA eSIM no service iPhone Android

USA eSIM no service iPhone Android — here’s how to fix it on both platforms:

iPhone:

Settings → Cellular → tap the eSIM line → Data Roaming ON
Toggle airplane mode ON/OFF
Settings → Cellular → Network Selection → turn OFF Automatic → try each carrier
Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings (your eSIM data stays, network settings reset)

Android (Samsung):

Settings → Connections → SIM Card Manager → tap the eSIM → Data Roaming ON
Toggle airplane mode ON/OFF
Settings → Connections → Mobile Networks → Network Operators → turn OFF Automatic → try each carrier
Settings → General Management → Reset → Reset Network Settings

Android (Google Pixel):

Settings → Network & Internet → SIMs → tap the eSIM → Data Roaming ON
Toggle airplane mode ON/OFF
Settings → Network & Internet → Internet → tap the eSIM → Network Selection → try each carrier

USA eSIM delete and reinstall profile

USA eSIM delete and reinstall profile — only do this as a last resort.

Why you should avoid deleting: QR codes are single-use. Once the profile is deleted, you’ll need a new QR code from the provider to reinstall. Most providers don’t generate replacement codes automatically.

When to delete:

You’ve tried every other fix in this guide
The provider’s support has confirmed it’s the next step
You have a backup QR code or the provider has issued a replacement

How to delete:

iPhone: Settings → Cellular → tap the eSIM line → Delete Cellular Plan
Android: Settings → Connections → SIM Card Manager → tap the eSIM → Remove

After deleting: Contact the provider’s support for a new QR code. Have your order number ready. The process may take 24-48 hours.

USA eSIM manual network selection

USA eSIM manual network selection can solve many signal issues:

iPhone:

Settings → Cellular → Network Selection
Turn OFF Automatic
Wait for the list of networks to appear (T-Mobile, AT&T, Verizon, and sometimes others)
Try each one: select T-Mobile → wait 30 seconds → check signal → try AT&T → wait 30 seconds → check signal → try Verizon
Keep the one that gives you the strongest signal

Android (Samsung):

Settings → Connections → Mobile Networks → Network Operators
Turn OFF “Select automatically”
Try each network → wait 30 seconds → check signal
Keep the strongest one

Android (Google Pixel):

Settings → Network & Internet → Internet → tap the eSIM → Network Selection
Turn OFF “Choose automatically”
Try each network

Why this works: Different carriers have different signal strength in different locations. T-Mobile is fastest in cities, AT&T has the best rural coverage, Verizon reaches remote areas. Switching to the carrier with the strongest local signal fixes many connection problems.

USA eSIM phone carrier locked issue

USA eSIM phone carrier locked issue — if your phone is carrier-locked, USA eSIMs won’t work.

How to check:

iPhone: Settings → General → About → Carrier Lock. If it says “SIM locked,” your phone is locked
Android: Settings → Connections → SIM Card Manager → Network Lock Status

What to do:

Contact your home carrier to request an unlock
Most carriers unlock phones that are paid off and not under contract
The unlocking process typically takes 24-72 hours
Request the unlock at least a week before your trip

If you’re already in the US and can’t unlock: Your only option is a physical SIM from a US carrier (T-Mobile, AT&T, Verizon) — they can sometimes work on locked phones. Pocket WiFi is also an alternative.

USA eSIM signal drops frequently

USA eSIM signal drops frequently — here’s why and what to do:

Cause	Fix
Moving between tower coverage areas	Normal — signal drops briefly between towers
Inside a building with thick walls	Move near a window or outside
Remote area with weak coverage	Drive to higher ground or closer to town
Network congestion	Try switching to a different carrier
Weather interference	Heavy rain can reduce signal — wait for weather to improve

If signal drops constantly: Try manual network selection to lock onto the strongest carrier in your area. Also check if you have a physical SIM in the phone — in rare cases, removing it can improve eSIM signal.

USA eSIM hotspot tethering not working

USA eSIM hotspot tethering not working — here’s how to fix it:

Check your plan’s hotspot allowance:

Holafly: 500MB/day cap
Ubigi: Unlimited (counts against data cap)
Tello: Unlimited (counts against data cap)
Airalo: Unlimited (counts against data cap)
Nomad: Unlimited (counts against data cap)
Roami: Unlimited (counts against data cap)

If hotspot isn’t working at all:

iPhone: Settings → Cellular → tap the eSIM line → Personal Hotspot → ensure it’s ON
Android: Settings → Connections → Mobile Hotspot and Tethering → turn ON

Check APN settings. If APN is wrong, data won’t work at all — hotspot won’t work either. Fix APN first.

Check data limit. If you’ve used all your high-speed data, hotspot will still work but at reduced speed.

Provider-specific troubleshooting

Airalo

APN: airalovpn or airaloglobal
Common issue: APN not automatically configured — manual entry fixes it
Support: In-app chat (24/7), email

Holafly

APN: holafly
Common issue: Hotspot cap 500MB/day — this is a plan limit, not a bug
Support: 24/7 live chat (fastest response time)

Ubigi

APN: ubigi or auto-configured
Common issue: Data roaming off — turn on manually
Support: Email, in-app chat

Tello

APN: auto-configured
Common issue: New accounts need ID verification — check your email
Support: Email, chat

Nomad

APN: nomad
Common issue: Same as others — check APN and data roaming
Support: In-app chat

Roami

APN: auto-configured
Common issue: Carrier switching may be disabled in settings — check network selection
Support: Live chat with real people (faster than chatbot-based support)

When to contact support

Try the fixes in this guide first. If you’ve tried everything and still have issues, contact your provider:

Provider	Support channels	Response time
Ubigi	Email + in-app chat	Within hours
Airalo	In-app chat + email	Within hours (chatbot first)
Holafly	24/7 live chat	Within minutes
Tello	Email + chat	Within hours
Nomad	In-app chat + email	Within hours
Roami	Live chat + email	Within hours
T-Mobile	24/7 phone + in-store	Immediate
AT&T	24/7 phone + in-store	Immediate
Verizon	24/7 phone + in-store	Immediate

Before contacting support, have ready:

Order number or eSIM profile ID
Phone model and iOS/Android version
The exact error message you’re seeing
Steps you’ve already tried (list them)

This significantly speeds up the process.

Prevention checklist for next time

Install the eSIM before you leave, on your home WiFi
Screenshot the QR code and save your confirmation email
Note the APN settings before you travel
Download the provider’s app before departure (useful for support chat)
Test your eSIM at the airport after clearing customs — you’ll be on US networks by then
Check carrier lock status at least a week before your trip
Keep a physical SIM as backup if possible
If you want to practice the whole process risk-free before your trip, USA eSIM offers automatic network switching and a free eSIM trial that lets you go through every step. Code WEB20 takes 20% off any plan.

Frequently asked questions

Why is my USA eSIM not working after arrival?

Most likely data roaming is OFF. Turn it on for the eSIM line specifically. If that doesn’t fix it, toggle airplane mode and restart your phone. Check APN settings if you have signal but no data. If you’re in a remote area, try manual network selection to pick the strongest carrier. For recurring issues, a provider with automatic switching like USA eSIM can help by connecting to the best available network.

Why is my USA eSIM data so slow?

Try switching to a different network (T-Mobile, AT&T, Verizon). Network congestion at peak hours (12-2 PM, 6-8 PM) can also slow speeds. If you’re on an unlimited plan, check the fair usage policy — you may have hit a daily or monthly cap. Switch from 5G to LTE — sometimes LTE is faster.

USA eSIM activation failed what should I do?

Try again after landing if you’re still in your home country. If you’re already in the US, check APN settings and manually select a network. Ensure data roaming is ON. Contact support before deleting the profile — QR codes are single-use. The USA eSIM setup guide has additional troubleshooting for common installation errors.

Why does my eSIM show no service in USA?

Your phone may not be connected to a US network yet. Toggle airplane mode ON/OFF, restart your phone, and try manual network selection. If none of these work, your phone may be carrier-locked. The USA eSIM coverage guide can help you understand which networks work where.

How to fix APN settings for USA eSIM?

Go to Settings → Cellular → tap the eSIM line → Cellular Data Network → enter the correct APN from the table above. Save and restart. On Android: Settings → Connections → Mobile Networks → Access Point Names → Add new APN. If values still don’t work, reset APN to default first, then re-enter.

My phone says emergency calls only with eSIM in USA

Your phone isn’t registered on any mobile network. Toggle airplane mode, restart, and try manual network selection. If the problem persists for more than 15 minutes, contact your provider’s support. Your phone may be carrier-locked.

What should I do if my eSIM doesn’t work in rural areas?

AT&T and Verizon have the best rural coverage. Try manual network selection and choose AT&T or Verizon. If your eSIM only connects to T-Mobile, coverage in rural areas will be limited — this is a network limitation, not a problem with your eSIM. For road trips, the USA eSIM road trip guide has more detail on which providers work best in remote areas.

Does resetting network settings delete my eSIM?

No. Resetting network settings (Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings) removes saved WiFi passwords, VPN settings, and network configuration, but eSIM profiles remain on the device. The eSIM will still be there after the reset. However, the eSIM may need to be reactivated — you’ll need to go back to Settings → Cellular, select the eSIM line, and ensure Data Roaming is ON. Some users find that resetting network settings resolves persistent activation issues without needing to delete and reinstall the eSIM.

Last updated July 2026.

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USA eSIM Troubleshooting Guide: Common Problems and How to Fix Them

Roami Team