problem to unlock c139 airtel

[williamvirk]

problem to unlock c139 Airtel sw version 1.3.29 here is log

Checking data, wait...
Connect...
Press and HOLD Power button...
connection mode: 02
Release Power button !
Connect Done
Boot...
Boot Done
Set Baud...
230400
Set Baud Done
Check Flash-1...
SW version: 1.3.29
HW version: _E88
imei otp: 35xxxxxxxxxxxxx
Check Flash-1 Done
Check Flash-2...
reading ...
file saved: backup_eeprom_calibration_xxxxxxxxxxxxxxx_20070425-114420.18E.bin
Err: non-locked or unknown eeprom
Check Flash-2 Fail
Finished, time used: 14 sec
Remove/Install battery now !

need help

[InfinitySupport]

power on phone with any sim
power off phone
repeat unlock process