I am on vacation in the USA and checked to make sure that I could use an AT&T SIM in the SIM2 slot in my Teracube 2e phone. All information to the positive, I bought and installed the SIM. In the shop where i bought it, we got it working, it took phone calls, and for about half an hour afterwards it worked fine - I sent multiple test messages (SMS) out to contacts to advise my new US number.
The battery died and I put it on to charge. Since the phone has been turned off, it is no longer registering the AT&T SIM - in either slot - while it readily allows me to use the Vodafone SIM that I’ve been using at home in Australia without any hassles. (The Vodafone SIM worked in whichever slot I used.)
I don’t think it’s the hardware, and since the connection worked while I was in the store (I sound like someone taking a car in for a repair - “It wasn’t working before I brought it in here to be repaired!”) I don’t think it was the SIM itself.
Thoughts, help, anyone?