My nokia 1600 is saying sim valid - Nokia Cell Phones

Hi,
Your Nokia 1800 is locked to its Network, that's why it shows "Sim not valid". In order to use other carriers, you need to unlock your phone. You can do this with Network unlock code. You'll be able to get this code from your service provider. If not you can get it from online sites. To have a clear picture on how to unlock your phone using the code, visit Mobileunlockguide.com , this site gives you free instructions on how to unlock your cell phone.

If you have MXKEY follow the instruction,1.OPen MXkey 2.bus check Go to Service >>IMEI and Security>>IMEI Rebuilt >>Read ASK >>Backup RPL >>Write RPL >>and click to From backup >> Restore IMEI. But remember the location, where did you save the backup.Thanks Good luck

If your mobile says "SIM not valid" then it must be a network problem. If your mobile is locked to a network you can only use that SIM. IF you need to use other network SIM you have to get a unlock code from your service provider. This is the reason why your mobile showed that message. Sites online also provide unlock codes. I usually unlock at www.wickedunlock.com which gives good solution.

nokia n73 sim card not valid problem solution system

Hi,

you can try to call the service sim provider to activate it for you.

thanks,

If the sim card says its not valid that means you need to contact your service provider so you can reactivate your sim card by giving them the serial number

throw it out...

you may seach google for 'nokia unlock code 1600'

yes sir' JAF can solve that prob.
by using RPL logs...