ZTE BLADE A520 - IMEI repair problem

[LondonTech]

Hello,

Tried by Meta and SPMeta modes. One showing done, other error. IMEI still null. I don't think root is available for this phone, please help. Logs below.

Selected connection metod: Meta Connection
Exe version: NCKBox AndroidMTK 1.8.8.3
Selected phone: MT6737M
Action : IMEI REPAIR.
IMEI[1] for write : 862974038525104
IMEI[2] for write : 862974038535103
Phone must be off with battery inside.
Please insert USB cable now...
In some phones need to keep VOL- button untill inserting USB cable.
[347]Detected: USB Modem Driver (COM347)
\\?\usb#vid_0e8d&pid_0003#5&29743192&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Starting META mode, wait...
Restarting to meta,wait....
If drivers missing, please install CDC drivers.
This can take up to 5 min on slow phones.
If take too long, check device manager for drivers.
[377]META Port Detected: Android Gadget VCOM Device (COM377)
USB\VID_19D2&PID_0299&MI_01\6&2CE8A3D4&1&0001
Start sync target, waiting responce.....
[AP]BaseBand CPU : mt6737m,S01
[AP]APP_VER: alps-mp-n0.mp1-V1.0.2_zte6737m.35g.n_P27
Making target channel configuration, wait...
Making tunnel configuration, wait...
Rebooting to meta, wait....
[META]BaseBand CPU : MT6735, E00
[META]SW_VER : MOLY.LR9.W1444.MD.LWTG.MP.V110.5.P31
[META]HW_VER : ZTE6737M_65_N_HW
Meta mode conected ok, start reading phone....
IMEI to repair: [1] 862974038525104
Phone imei[1] : 862974038525104
IMEI to repair: [2] 862974038535103
Phone imei[2] : 862974038535103
Clean Boot flag ok.
All done.

Selected connection metod: SpMeta Connection
Exe version: NCKBox AndroidMTK 1.8.8.3
Selected phone: MT6737M
Action : IMEI REPAIR.
IMEI[1] for write : 862974038525104
IMEI[2] for write : 862974038535103
Scanning for presents meta ports...
Phone must be off with battery inside.
Please insert USB cable now...
In some phones need to keep VOL- button untill inserting USB cable.
[347]Detected: USB Modem Driver (COM347)
\\?\usb#vid_0e8d&pid_0003#5&29743192&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Starting META mode, wait...
Restarting to meta,wait....
If drivers missing, please install CDC drivers.
This can take up to 5 min on slow phones.
If take too long, check device manager for drivers.
[377]META Port Detected: Android Gadget VCOM Device (COM377)
USB\VID_19D2&PID_0299&MI_01\6&2CE8A3D4&1&0001
Start sync target, waiting responce.....
Starting META using port[COM377], wait...
Brand: ZTE
Board: MT6735
Model: ZTE BLADE A520
Name: P637F10_RU
Release: ZTE_BLADE_A520V1.0.0B12
Version: 7.0
Platform: MT6737M
Using Algo 2.
Using Algo 2.
NVRAM Dumped OK.
C:\Users\Aleksander\Documents\Android_MTK\nvram_ba ckup\META_MODE_NVRAM_MT6737M_ZTE BLADE A520_11_06_2017_17_14_55.zip
Reading imei
IMEI[1]: 862974038525104
IMEI[2]: 862974038535103
Writing imei
IMEI[1] TO UPDATE: 862974038525104
IMEI[2] TO UPDATE: 862974038535103
Writing data, wait....
Error while repair imei: General error.
All done.

[Fast Unlocking]

in such case if hardware is ok then need to write good security backup from working phone to this phone and after repair imei

[LondonTech]

Thanks for quick reply. Looked long and wide, unfortunately for some reason it's very hard to find any firmware, let alone nv backup for it. Is there anything else we can do? Got two phones with the same problem.

[orbita]

Error while repair imei: General error.
If you have this error you must use meta mode.

But...if exe read imei and phone not display imei(was writed about in exe help and discussed many time in forum) repair imei will not help.
If you have little experience with phones, you must know this.
Missing imei in mtk can be also related to security problems.
Damaged simlock = imei null
Hardware damaged modem = imei null
firmware problem = imei null
In this cases really will not help if you will repair imei, need to solve problem what cause this.