How can I upgrade my modem to latest version? I recently bought a Fastrask supreme lte 4G
modem but I got the problem in sim connection. I always got the message: “Sim not inserted”.
Im using Tmobile and H20 carrier, both carriers are belong to USA. Does this model support for these 2 carriers Tmobile and H20?
In addition, how can I get EC25A and EC25 AF modems? Are there any differences with EC25 A modem and modem EC25? The EC25 doesnt support US carriers?
Dear Tn85260,
Thanks for your inquiry in Quectel forum.
Please note that EC25 just a common module type which contains many variants apply for different region, such as EC25-A and EC25-AF are can apply for North America and Mexico, of course can support USA carriers.The following are supported bands of the two module, please check. Thanks!
Dear Tn85260,
Please check whether the SIM card connection is normal, you can unplug and plug SIM card again to have a try, or you can check the SIM card hardware design circuit, also you can try whether have to set SIM detection function with AT+QSIMDET. Thanks!