GSM Module Error: No Network !

[namnp]

Hello,

I have two GSM modules and one of them seemed to be faulty: the board\' D4 ERR led  (SGM module, 5.98) always ON since first switch on?. What can I need to check ?

The other GSM module is working fine.

Thanks

[slychiu]

Could it be a nework error? Have you tried exchanging the SIM cards between the two modules?
Also please check the antenna connection, and the ID settings

[leonchue]

Some SIM cards are code-protected (ie. need to key in password to use them).  You need to disable the feature if that is the case. 

[namnp]

It\'s alright now. I have no answers why it\' s OK now. Actually I did not change any on board ID, sim card, antenna... just after several full downloads for other responses\' changes.

Thanks