APN stands for Access Point Name. It is the gateway setting that tells your device which network path to use for mobile data. RelaxedSIM data SIMs normally apply the correct APN automatically, but some unlocked devices and IoT cameras require a manual setup. This page lists the exact APN details for every RelaxedSIM USA data SIM. Whether you compare this with an AT&T SIM card, a T-Mobile SIM card, or a Verizon SIM card, the APN details are identical because every RelaxedSIM data SIM connects on all three US networks.
RelaxedSIM USA APN settings
| Setting | Value |
|---|---|
| SIM / ICCID | USA SIM SN/ICCID: 8910**** |
| APN | globaldata |
| Username | Leave blank |
| Password | Leave blank |
Only the APN name matters. You do not need to enter a username or password, and there is no proxy or port to configure. The value is identical for the free 100MB/7-day trial and for every paid plan (3GB/30 days, 6GB/90 days, 12GB/180 days and 24GB/360 days), so you never need to change it when you top up.
How to set the APN on your device
- Set up APN on an unlocked iPhone
- Set up APN on an Android phone
- Set up APN on Reolink 4G cameras
- Activate a SIM in an unlocked IoT device
- Set up APN on mobile hotspots and routers (NETGEAR, GL.iNet, TP-Link, Inseego, GlocalMe)
- NETGEAR MR6400 APN setup (Emlid GNSS)
- Victron LTE modem / GX device setup
- PredictWind DataHub Pro setup
Where the APN setting lives, by device type
| Device type | Where to set it | Notes |
|---|---|---|
| iPhone | Settings → Cellular → Cellular Data Network | If the menu is missing, remove and re-insert the SIM; a carrier profile can hide it. Turn on Data Roaming. |
| Android phone | Settings → Network & internet → Mobile network → Access Point Names | Create a new APN, save it, then tap it to select it. Names differ by brand. |
| Reolink 4G camera | APN file on a FAT32 microSD card | The file must be named exactly my_custom_apn.txt and sit in the root folder, then factory reset the camera. |
| 4G hotspot / router | Web admin page or device menu, under APN / Profile | Some models hide the field behind an “automatic APN” toggle — turn that off first. |
| Tracker / industrial IoT modem | Vendor configuration tool or AT command | Set the same APN, blank user and password, and enable roaming where required. |
How to check the APN is working
- Confirm the device shows signal bars — the APN only affects data, not the radio connection.
- Open a simple page such as
https://relaxedsim.com/relaxedsimapn/in a browser, or send a test image from the camera app. - If nothing loads, re-open the APN screen and check the value is exactly
globaldatain lower case with no trailing space. - Enable data roaming, then restart the device and wait one minute for the network to register.
- Still nothing? Move the SIM to a phone. If the phone connects, the APN on the original device is the problem; if the phone also fails, contact support with the ICCID.
Common APN problems and fixes
| Problem | What usually fixes it |
|---|---|
| Signal bars but no internet | APN typo, blank username/password not actually blank, or data roaming switched off. |
| Android APN reverts after a restart | Save the APN as a new profile (do not edit the carrier entry), then select it in the APN list. |
| iPhone “Cellular Data Network” menu missing | Install a SIM without a carrier profile, remove and re-insert the card, then reopen Settings → Cellular. |
| Camera says the APN file imported but there is no data | Re-format the microSD card to FAT32, make sure the file is not inside a folder, and factory reset the camera. |
| Hotspot connects, then drops | Disable the automatic APN or operator-profile option and enter a manual profile with globaldata. |
| Data stopped after moving the SIM to another device | Re-check the APN on the new device — the SIM keeps working, but the new device may not have a saved profile. |
Why one APN works on AT&T, T-Mobile and Verizon
RelaxedSIM USA SIMs are data-only prepaid SIMs that register on all three major US networks. Because the SIM is not tied to a single carrier brand, the data path is defined by the APN on the card rather than by a carrier-specific profile. That is why the same value — globaldata — works whether the device lands on AT&T, T-Mobile or Verizon coverage, and why you do not need a new APN when the device roams between them.
Not sure which card size your device takes, or need to add data to an existing SIM? See which SIM size fits your device and how to buy or top up a data plan.
After saving the APN, enable data roaming and wait up to one minute for the connection. Your free 100MB/7-day trial starts automatically the first time the SIM connects.
POS terminals and other commercial devices
Using a RelaxedSIM card as a cellular backup link for a point-of-sale terminal? See our 4G backup guide for POS terminals for the checks that matter before you buy — SIM slot, carrier lock and manual APN support.
Frequently Asked Questions
Why does my SIM show a signal but no internet?
Check that the APN is exactly globaldata with no username or password, that data roaming is enabled, and that your device is unlocked. If the SIM was just inserted, wait one minute for the network to register.
Is the APN the same for every RelaxedSIM USA plan?
Yes. All RelaxedSIM USA data SIMs use APN globaldata with blank username and password, regardless of the data plan or whether you are still on the free trial.
Do I need a username or password?
No. Leave both fields blank. If a device will not save the profile without a value, enter a single space in the username field only.
Do I need to change the APN when I move the SIM to another device?
No. The APN belongs to the SIM, not to the device. However, the new device needs its own saved APN profile, because most phones and routers keep that setting per device rather than reading it from the card.
What if my device has no APN settings menu at all?
Some locked-down devices hide the menu and use an operator profile instead. If the device is unlocked and still has no menu, check the vendor documentation or contact us with the device model and ICCID.
Does the APN change when the device roams onto another network?
No. The SIM uses the same APN on AT&T, T-Mobile and Verizon coverage. If data stops after a network change, toggle airplane mode or restart the device rather than editing the APN.