The 735 has these bands
CDMA network bands: BC1 (1900 MHz), BC0 (850 MHz)
- CDMA max data speed DL: Rev 0 /A 2.4 Mbps /3.1 Mbps
- CDMA max data speed UL: Rev 0 /A 153.2 kbps /1.8 Mbps
Whereas the 950/XL does not and like Tidbits said this topic has been beaten to death. Take some time and read the posts here.