It's a motorola slvr and it's cingulair. I live in el paso tx and i was just wondering if there would be anyway i could flash that phone to cricket? it does have a sim card. and i don't have service on it.

Unfortunately this is not possible since Cricket uses CDMA and AT&T is GSM. The device just uses a different technology than Cricket's network support. The simple difference is that Cricket does not use SIM cards and AT&T/Cingular uses them.

The only possible devices you could use would be CDMA network phones such as Verizon or Sprint. But you would need them to be unlocked and hope that Cricket would activate the device since it would not be supported by their network since they do not sell it (assuming it's a device Cricket does not sell)