Hello,
So I’m working with a GM862-QUAD with the USB Evaluation Board from Sparkfun. It came with the FW 7.03.600, but I wanted it to accept some new AT commands, so I tried upgrading it to 7.03.402, but it wouldn’t start after that.
Later I tried changing it to 7.03.600 back again, but it stays the same, not turning on.
I’m not sure if there’s a problem with the module after upgrading or if I’m doing something wrong…
I upgraded with the Xfp tool, I’m not sure if there is a problem after upgrading that keeps the module from turning on. It only keeps blinking as if there is no SIM card…
I hope you can help me out. Thanks!!