Here is How...

1. Connect phone with Infinity Box Pin finder, L10C cable pins RX 4 TX 5
2. Read eeprom and full flash backup and for support@infinity-box.biz
3. Choose Model ZTE-X760 and unlock method: smart fast
4. Enjoy Unlocked Phone

Here is Log...

COM10 [VCP0] selected
module v2.71
Action: unlock
unlock method: smart fast
Model: ZTE-X760Checking data, wait...
Phone should be Switched OFF !
Press and HOLD Power button now !
19200 autodetect
Initializing [6225:8A03:8A00]...
CPU: MT6225
chip: 0001:5203:0003
status: FF
Connecting at 19200, wait...
Release Power button now !
Phone detected, wait...
Hardware: MT6225,E03
Date: 2006.06.14
Version: 1.0
Version: X760_Z15UK_FS_B07A105
Version: ZTEMT25_07A_HW_C
44 byte(s) read
imei: 35235302112611
connection Ok
157 byte(s) read
reading data...
building new data...
writing data...
145 byte(s) read
reading data...
building new data...
writing data...
verifying...
verification Ok
done
Finished, time used: 12 sec
Remove/Install battery now !