sim not recognised?

I guess your New phone is locked.That's why your phone says "Insert Sim" error.To solve this problem,you need to get it unlocked your phone.You can unlock your phone using unlock code.you can get the unlock code for your phone from any third party online vendors like http://www.mobileunlocksolutions.com/supported-phones/rs16wp7/ here you need to specify your phone model, country, Network name to which it is locked, IMEI number of your phone. Then they deliver unlock code to you through mail with unlocking instructions.Using this you can unlock your phone from Network lock easily.Once your phone is unlocked you can use use any GSM Sim in it.

sahana
October 2013

you may need to call 3 customer services to get the old sim paired with the new handset.

Adam
June 2009