Sprint iphone 5 64gb unlocked for US gsm use?

Anybody confirmed and tried to use the sprint iPhone 5 64gb on us carrier like at&t or t-mobile?
please anybody respond?

No it is not possible.

Sprint is CDMA, AT&T is GSM
After we unlock your iphone http://attiphoneunlocker.com/ connect to itunes with a non accepted sim (for example a tmobile sim) and do a back up and restore. Your phone can now be used with any gsm network. You can safely update the OS on your handset at any time, and sync your device with your computer without fear of Apple removing your unlock
We provide an AT&T Official, Permanent, Apple unlock that remove any network restrictions your iPhone may have by marking your handset as unlocked in Apple's IMEI database.
Once your Unlock has been processed just follow these simple steps:

1) Open iTunes on your Mac or PC (verify you have internet connectivity).

2) Connect your iPhone to your computer using the USB data cable.

3) Backup and Restore your iPhone using iTunes.

4) Once your iPhone is restored it will have the Factory Unlock in place!

http://attiphoneunlocker.com/