Motorola V3 razr doesn't work with a 3 sim card as it's a 2G phone, MUST be 3G to work.
However you can get a Motorola V3x which WILL work with 3 but must be the V3x if you do want a razr phone. Either buy it on 3 or it must be UNLOCKED.
2G phones work from 900mhz to 1800mhz, the 3 network runs on 2100mhz so NONE 3G phones take the sim but give no signal.
Hope this helps.
GATORS
Craig
October 2008