[sumankumar26]

i am using nokia 5235 from last 1 year.recently i got some prob so i went nokia care and completed my software update.now i m getting "no answer" message wenever i call anyone.i thought it was a sim prob. so i brought new sim also but still m facing same prob.can any1 tell me it mobile prob or network problem ?

[astra2025]

Hi sumankumar26, 

Welcome to discussions board! 

If you have replaced your SIM card and the problem persists, it may be a problem with the phone itself. First of all I adivse you to perform these steps: 

1) Type *#7780#. Default lock code is 12345.

2) If the issue persists, perform a hard reset. First of all, back up your data using Nokia Suite. Once your data is fully backed up,  type *#7370# on the keypad. 

3) Alternatively, you may also check for updates on Nokia Suite (by going to Tools > Updates). 

If the issue still persists, I advise you to contact your Nokia Careline and speak with the after sales department. 

Feel free to post any other questions you may have. 

Regards, 

astra2025