Regarding registering to the network

[sjoshidce]

@awneil

Check your power supplies!

After start-up, registering to the network is the first thing that actually requires the module to transmit. If your power supplies are not quite right, everything can seem fine up to that point - but the real test is whether the supplies are man enough for transmitting.

Get your scope on the module’s supply pin, and look carefully - especially during the Tx bursts…

The power supply i am using 1s 3.8V/3A and the same PCB board is working fine when used in india.