If you use a RelaxedSIM USA IoT SIM card in a PredictWind DataHub Pro, you may see the SIM’s ICCID missing from the device page or an “APN globaldata is invalid” error. In our support case the cause was simple: the SIM was inserted and the APN was changed without powering the unit off first. The fix is to do the setup with the DataHub Pro powered off, restart after each change, and let the modem reload the SIM and APN correctly.
The fix that worked: PredictWind DataHub Pro + RelaxedSIM USA IoT SIM
- Power off the PredictWind DataHub Pro completely. Do not insert the SIM or edit APN settings while the device is running.
- Insert the RelaxedSIM SIM while the unit is off. Punch out the Nano size from the 3-in-1 card and place it in the SIM slot.
- Power the DataHub Pro back on and wait for it to register on the network.
- Open the DataHub settings and confirm the ICCID now displays.
- Set the APN to
globaldatawith a blank username and password, and enable Data Roaming if the device exposes this option. - Power the unit off and on again after saving the APN. A full restart after inserting the SIM or editing the APN is what makes the new settings take effect.
Why does the DataHub Pro show “APN globaldata is invalid”?
In most cases the APN itself is correct — the device simply has not reloaded its modem settings. This happens when the SIM is installed or the APN is edited while the unit is powered on. The PredictWind DataHub Pro only applies the new SIM profile after a full power cycle: power off, install the SIM, power on, save the APN, then restart again so the modem reads the card, displays its ICCID, and loads globaldata correctly.
Why a data-only IoT SIM for the USA fits PredictWind DataHub Pro
The PredictWind DataHub Pro is a marine data gateway that connects onboard instruments such as GPS, navigation, and weather systems, then sends data to shore over 4G/5G or satellite. A data-only USA IoT SIM card is the right connectivity choice: RelaxedSIM SIMs are pre-activated, connect on AT&T, T-Mobile, or Verizon, and need no contract or credit check. For a boat that spends most of its time in US waters, the USA data SIM category lists every plan. Mariners running PredictWind in our support case used the 6GB/90-day plan, which gives a full season of weather and position data without monthly renewals.
Frequently Asked Questions
Why is my ICCID not displayed in PredictWind DataHub Pro?
The unit was probably still powered on when the SIM was inserted. Power it off, insert the SIM, power it back on, and wait for the modem to register. The ICCID should then display in the device settings.
PredictWind DataHub Pro says the APN globaldata is invalid. What should I do?
Enter globaldata with a blank username and password. If the device still rejects it, the SIM or APN change was probably made without a restart. Power the unit off, leave the SIM installed, power it back on, re-enter the APN if needed, and restart again.
Does this IoT SIM for the USA work in marine equipment?
Yes, as long as the equipment accepts a physical Nano SIM. RelaxedSIM SIMs are data-only and work in PredictWind DataHub Pro units, routers, cameras, trackers, and other IoT devices on AT&T, T-Mobile, or Verizon when you follow the power-off setup above.
Which plan should I choose for a PredictWind DataHub Pro?
Start with the 6GB/90-day plan for a full season of marine weather and tracking data. Choose a larger 24GB/360-day IoT SIM if the DataHub Pro will run year-round or push frequent weather data.