Just need a little help... I'm trying to turn on the SIM800l, but the device is not working. I'm using a 5V power with a voltage divider (10K - 47K) to the device requirement of 4V Vcc, but the LED doesn't turn on... I tested the Vcc and GND and there are no short circuit, and (just to check) I tested the LED and it worked. I want to know if the module is destroyed or something and if there is a test that I forgot to check. Thanks!!!