 This portability is not as extensive with IS-95 phones, however, as IS-95 networks do not exist in most of Europe.Mobile networks based on different standards may use the same frequency range; for example, AMPS, D-AMPS, N-AMPS and IS-95 all use the 800 MHz frequency band.Moreover, one can find both AMPS and IS-95 networks in use on the same frequency in the same area that do not interfere with each other.