This guide shows how to use a RelaxedSIM USA data SIM in an unlocked iPhone. On most iPhones the APN is set automatically — you only need these steps if the phone shows a signal but no internet.
Set up RelaxedSIM on an unlocked iPhone
- Insert the RelaxedSIM nano SIM card and power on the iPhone.
- Open Settings → Cellular (or Mobile Data).
- Tap Cellular Data Network to open the APN settings.
- If you see Use Carrier Settings, turn it off.
- Enter the APN details below:
- APN:
globaldata - Username: leave blank
- Password: leave blank
- APN:
- Go back and save the settings.
- Turn on Data Roaming in Settings → Cellular.
Your free 100MB/7-day trial starts automatically the first time the SIM connects. If data still does not work, restart the iPhone and wait one minute.
Frequently Asked Questions
I cannot find Cellular Data Network on my iPhone.
On some carriers and iOS versions the APN menu is hidden until a SIM without a carrier profile is installed. With the RelaxedSIM SIM inserted, the Cellular Data Network option appears under Settings → Cellular.
Does the iPhone need to be unlocked?
Yes. The SIM works in unlocked iPhones that accept a physical nano SIM card. Carrier-locked phones may not accept a SIM from another provider.
Do I need to enable data roaming?
Yes. Enable Data Roaming after saving the APN; this is required for the connection to work on the AT&T, T-Mobile, or Verizon network.