gsm module not working

Using Arduino Networking, Protocols, and Devices
1

my gsm module blinks every 1s. I'm not sure if the sim card is the problem. Can you guys help me please.

2

knownothing:
Can you guys help me please.

We're good, but not psychic.

3

@knownothing, you need to post your program and also a link to the datasheet for your GSM module.

It would also be a good idea if you tell us what your program should be doing.

...R