Network busy I got a new cell phone and transferred my sim card from my old phone and it worked great for 2 weeks. But now, whenever I try to call out, I receive the message "network busy" everytime. I put the sim card back in my old phone and it works fine. Do you know what's wrong with my new razor or how I can fix it?

Leave old sim card in phone . copy contacts to phone . take old sim out . insert new sim card . copy contacts from phone to new sim card.

Follow the link. How to Transfer Apps and Data to New Phone

So long as the old sim card was not damaged and that the new phone is either on the same network or is sim free it should just work after you have fitted it to the new phone.

Try 'rebooting' the software by removing the battery for a couple of minutes and then replace it.
You will have to reset the time and date

Try the SIM card in a friend's phone.
Try a friend's SIM card in your phone.

If you need to transfer your old mobile number from one network sim to another network sim means try number portability.It's one of the best and safest way.For porting,try to do the following steps.
1.You will need your PAC(Porting authorisation code) from your current network service.
2.Then contact your new mobile service and tell them your PAC.They will provide your new sim card with your old mobile number.
After getting your new sim card,Make sure your phone is unlocked one.If it's restricted by single network means,try to unlock your mobile before swap your sim.For unlocking visit
Mobile-Unlocker.com

It's not possible as the two networks are not compatible with each other for the V3xx. With other phones it may be as easy as swapping SIM cards.

Motorola Support

old messages inside the inbox, can either be carried by the sim card to another phone or it would be left on the phone memory of your Nokia 1661..contacts are always carried by the sim card..therefore whenever you transfer your sim card to another phone..the contacts will not be erased, it will still remain as it is.

did u try the same network sim? coz by the sounds of it u ave blocked the network

If your not really up for the work to go through for this. You can just have T-Mobile give you a new one for your phone. The SIM card transfer you would have done would have saved only your phone book.

If you are into looking to transfer the SIM card. Call your phone maker. In most Cases its Motorola for T-Mobile.
Call them, and tell them that your trying to transfer your SIM into a newer phone. Alas, They should tell you the code to unlock your phone

Hope this helps!