GAIT (an acronym for the GSM-ANSI-136 Interoperability Team) is a wireless standard developed in 1999[1] that allows cross-operation of mobile telephone technologies.
A GAIT-compliant mobile phone typically accepts a SIM card, similar to a standard GSM phone; however, depending on the wireless provider, the SIM card enables access not only to that wireless provider's GSM network, but also enables use of the telephone on any TDMA or AMPS networks run by the wireless provider.
In the United States, Cingular Wireless (now AT&T Mobility) offered the Nokia 6340 and Sony Ericsson T62u to customers who wished to have a GAIT mobile phone (although these phones are no longer marketed through AT&T).
The version sold by Fido was unique in that it was used solely for analog roaming, with the IS-136 "TDMA" portion of the phone disabled.
Rogers Wireless, meanwhile, never offered a GAIT solution to customers, as their entire IS-136 TDMA and AMPS networks were overlaid with GSM by the time the service was launched.