Need Help Unlocking ZTE G-N281

[beerfoote1]

Hi,
I have a serious problem unlocking this ZTE G-N281. I am able to flash the phone changing firmware. But I cant unlock it.
The original firmware was :- ZTE-N281_ZTENJ35_09A_PCB01_GPRS_MT6235B_S01.TMO_UK_P10 7A3V1_0_1B10__firmware_20110226-141021.B4M

Now firmware is :- ZTE-G-N281_ZTENJ35_09A_PCB01_GPRS_MT6235B_S01.VF_UK_EN_P 107A4V1_2_0B03_2010-04-01_En.B4M

But when I try unlock the phone I get the following error:-

COM41 [VCP0] selected
module  v3.75
Action: "sp-unlock"
unlock method: smart fast
Model: ZTE-N281
Checking data, wait...
Phone should be Switched OFF !
Press and HOLD Power button now !
19200 autodetect
Initializing [6235:8A04:8A01]...
CPU: MT6235
chip: 0000:0000:0003
status: FF
rom: 4D573031
Connecting at 19200, wait...
error: can not finalize test mode
repeat operation and HOLD phone "Power" button more long time !
error: operation failed !
Finished, time used: 1 min 25 sec
Remove/Install battery now !

I use the GW300 FBUS cable. The testpoints are damaged by another technician attempting to unlock it.

Please can it be done ?

[InfinitySupport]

Hello,

As I remember, it may be a probelm with unlock via phone connector, and if phone can not be connected via cable I have adviced to everybody to use test points under battery.

Anyway, you can try to repeat unlock several times and press and HOLD phone "power" button more long time


Also, here is keyboard codes:
*#33#
*#331#
*#332#
*#35#
*#351#
*#62#
*#61#
*#67#
*#21*
*#43#
*#0000#
*#3646633#
*#66*#
*#523#
*#678#
*#876#
*#6810#
*#1234#
*#900#
*#901#
*#931#
*#932#
*#933#
*#902#
*#903#
*#20801#
*#3366*#

Probably one of them helps to enter into service menu and then you can try to change COM port settings.
I am not sure that it helps, but you can try.

Waiting for your results.

[tonygsm20]

Originally Posted by beerfoote1

Hi,
I have a serious problem unlocking this ZTE G-N281. I am able to flash the phone changing firmware. But I cant unlock it.
The original firmware was :- ZTE-N281_ZTENJ35_09A_PCB01_GPRS_MT6235B_S01.TMO_UK_P10 7A3V1_0_1B10__firmware_20110226-141021.B4M

Now firmware is :- ZTE-G-N281_ZTENJ35_09A_PCB01_GPRS_MT6235B_S01.VF_UK_EN_P 107A4V1_2_0B03_2010-04-01_En.B4M

But when I try unlock the phone I get the following error:-

COM41 [VCP0] selected
module  v3.75
Action: "sp-unlock"
unlock method: smart fast
Model: ZTE-N281
Checking data, wait...
Phone should be Switched OFF !
Press and HOLD Power button now !
19200 autodetect
Initializing [6235:8A04:8A01]...
CPU: MT6235
chip: 0000:0000:0003
status: FF
rom: 4D573031
Connecting at 19200, wait...
error: can not finalize test mode
repeat operation and HOLD phone "Power" button more long time !
error: operation failed !
Finished, time used: 1 min 25 sec
Remove/Install battery now !

I use the GW300 FBUS cable. The testpoints are damaged by another technician attempting to unlock it.

Please can it be done ?

cable used gs102 hi ... that's your error with no ****s GW300 .. and hold power button until the end of the process k has been hope my contribution helps .. thanks ..

A humble Tony-Gsm