🔔 This guide is for Smart SIMs only
Before you begin 📍
Your Smart SIM lets you stay connected when you're in the UK or abroad. You'll need:
The Smart SIM email with your QR code
The Honest app installed on your phone
A few minutes to complete the setup
Installing your Smart SIM 📲
This adds your Honest Smart SIM to your phone so you can start using it.
Open the Smart SIM email you received
Find the QR code and scan the QR code with your phone
Unable to scan the QR code? Try this guide to add it manually
Enabling data roaming
This makes sure your Smart SIM works properly and is connected when you’re in the UK or abroad.
Open Settings
Tap Network & Internet or Connections
Tap SIMs or Mobile network
Select your Smart SIM
Turn on Data Roaming
Updating the APN
This makes sure your Smart SIM connects to use data services.
Open Settings
Tap Network & Internet or Connections
Tap SIMs or Mobile network
Select your Smart SIM
Tap Access point names
Select the '+' in the top right
For Name, put in 'Smart SIM'
For APN put in '
data00.telnyx'Leave the rest blank and tap Save
Ensure this APN is selected
Switching to Smart SIM
Switch to Smart SIM in just a few taps.
Switch to Smart SIM on Samsung
Switch to Smart SIM on Samsung
1. Swipe down from the top of your screen twice and open Quick Settings
2. Tap Mobile Data
3. Switch your data line to Smart SIM
Follow the same steps to switch data back to your main SIM.
Switch to Smart SIM on Google Pixel
Switch to Smart SIM on Google Pixel
1. Go to Settings and tap Network and Internet
2. Tap SIMs
3. Scroll down, tap Mobile Data and switch to your Smart SIM
Follow the same steps to switch data back to your main SIM.
Switch to Smart SIM on another Android device
Switch to Smart SIM on another Android device
1. Open Settings
2. Go to Connections or Network and Internet
3. Select Mobile Data and switch your data line to your Smart SIM
Follow the same instructions to switch data back to your main SIM.
Configuring data switching
We recommend also setting up automatic data switching. This means in the moments you can't manually switch to Smart SIM and your main SIM has completely lost signal, Smart SIM will kick in.
Open Settings
Tap Cellular or Mobile Data
Tap Cellular Data
Select your main SIM (not the Smart SIM)
Turn on Allow Cellular Data Switching
Configuring data switching
This makes sure your main SIM handles mobile data, and your Smart SIM can step in when needed.
Open Settings
Tap Network & Internet
Tap SIMs or Mobile network
Under Mobile data, select your main SIM (not the Smart SIM)
Turn on Mobile data switching (wording may vary by phone)
Making sure VPNs are off
VPNs will block your Smart SIM connection, so it's best to turn them off.
Open Settings
Tap Network & Internet
Tap VPN
Turn off any active VPN
Turning off Private DNS
Some DNS settings can interfere with your Smart SIM. Turning it off helps avoid issues.
Open Settings
Tap Network & Internet
Tap Private DNS
Select Off
What's supported 🛟
Apps
We support apps that use low data to help keep costs down for everyone.
Countries
We've partnered with networks around the world so your Smart SIM works wherever you go.
Testing your Smart SIM ✅
Once your device is set up, check your Smart SIM connection using the Smart SIM test in the Honest app. It only takes a few seconds and will confirm if your Smart SIM is working as it should.
Using the in-app test 📲
Once logged into the app. Tap on the SIMs tab from the bottom menu
Tap on your Smart SIM
Scroll down and tap on Test your Smart SIM
Go through each step and complete each task so you see a ✅
Turning off any VPNs
Turning off any WiFi connections
Ensure you're connected to the Smart SIM
When all ✅ are complete, tap on the Test your Smart SIM button
Once complete, your Smart SIM should be working
Using the backup test page
1.Turn off all other SIMs except your Smart SIM on your device.
Disable Wi-Fi and any other SIMs so only the Smart SIM’s mobile data is active.
Open a browser and go to https://smartsim.honestmobile.com.
Look for a ✅ or ❌ indicator.
Changing networks
Smart SIM will connect to the network with the best coverage and stick to it until it drops. Follow these steps if you'd like to choose a different network:
Open Settings
Tap Network & Internet or Connections
Tap SIMs or Mobile Network
Select your Smart SIM
Turn off Automatic Selection
Wait for the list of available networks to load (this can take up to 2-3 minutes)
Tap the network you want to connect to.
This can be handy for testing another local network in your area or if your usual connection isn’t working well. The UK supports connections on EE, O2, Three and Vodafone.
Supported International networks are available by viewing our list of supported countries: https://help.honestmobile.com/en/articles/9706266-which-countries-does-smart-sim-cover
Moving your Smart SIM to a new phone
Got a new phone you want to move the Smart SIM to? No problem.
Uninstall the Smart SIM from your old phone
Find the initial email we sent you with your Smart SIM QR code.
Scan the QR Code to activate the smart SIM on your new phone
The Smart SIM will then be added to your new phone
Follow the on-screen instructions to complete the setup.
If you no longer have access to the initial email with the QR code or manual install details, you can request a replacement within the app.
Just select the Smart SIM and then choose Change Device.
Basic troubleshooting 🔧
If something’s not working, try these quick fixes first.
Check that Mobile Data is on
Check that Data Roaming is on
Check you've updated your APN
Check that Private DNS is off
Check that any VPNs are off
Restart your phone.