hi,
i dont know if this is the right place to ask this question but i thought i might ask...any help would be much appreciated.
i am using a GSM modem specifically SIM300 and the sim is not registering to the network...i checked it using the AT+CREG? command and it returns +CREG:0,2 which means it is searching for an operator to register to. after sometime on the query again i get +CREG:0,0 which means it is no longer searching for an operator. it is a new sim(tata docomo) which works fine in a cell phone. when i use a sim from a different operator(vodafone) it is registering.
i googled for this problem and i could see one other person who faced this problem but there was no solution provided there.
if you have a solution or any troubleshooting please let me know. thanks in advance!
@westonsupermare pier - thanks for replying again
here is what response i get when i execute the 2 commands
AT+CCID 89910341610344270127
OK AT+CIMI 405034034427012
OK
it also has a valid IMEI but i just found out that the number mentioned on the GSM module and the number returned by AT+CSGN? command are not the same. could this be a problem? The IMEI returned by the command,352360000020000, is valid which i checked using this link imei-number.com/.../. the other IMEI is valid as well.
Does the modem's ability to register do the same thing if you just remove the SIM completely?
i didnt get your meaning but if you are asking me what happens if i remove the sim and then turn on the modem then it shows sim not inserted of course...even as i am writing this i think that is not what you meant...
Yes, I meant take out the SIM, and observe the CREG status over time. Does it result in not registered, not looking?
If the modem and/or SIM are not compatible with each other, you'll have to change one of them until they are.
If you are talking to front-line support staff at the network they are likely to be next to useless in resolving any incompatibility issues. You'd need to find someone specializing in M2M applications, and network support thereof, and modems approved for network use.
@Westonsupermare Pier after taking out the sim it does not register..it returns +CREG : 0, 0. this was expected since without a sim it will not register on the network.
i understand that i will have to change the sim/modem until i solve this problem...right now changing the sim seems to be a good idea but i was looking for that particular provider since they provide the lowest rate on a data plan...
anyway thanks for your support...will post the solution here if i find it.