I picked up a funny network registration problem with a fastrack supreme.
The network indication LED starts blinking a few seconds after startup but at+creg? returns 0,0. The problem is not with the SIM and network reception. I thought it might be some setting on the module, but I went through all the network registration AT commands and tried at&f but it keeps doing it. The module won’t register to the network but the LED keeps on flashing.
The problem happens with and without an OpenAT app running, and only with this one module.
Could it be that the network is blocking the IMEI? Any suggestions?