i9100 unable to change imei instead it enters 004999010640000

[pocgoc]

Hi,
First time use: I enter in the imei to change it to original imei and it keeps putting 004999010640000 as the imei.
Samsung tool 15.1
x64 Windows seven
i9100 2.3.3

I spotted something similar on here but can't find that topic any more.
Selected model: I9100
Selected port: COM2 Communications Port
Selected port speed: 115200
Reading phone info...
Model: GT-I9100
Android version: 2.3.3
Product code: GT-I9100LKAERA
Phone version: I9100XXKE7
PDA version: I9100XWKF3
CSC version: Unknown
IMEI: 004999010640000
Checking Super user right... true
Reading data from phone... OK
Writing data to phone... OK
Rebooting phone... OK
Searching Samsung modem... detected COM25
Waiting while modem will be ready... OK
Reading phone info...
Model: GT-I9100
Country code: ERA
Cal date: -
Factory SW: I9100XWKF3
Unique number: CVY19847C67E79E
Memory phone: -
Software version: I9100XWKF3//I9100XXKE7/I9100XWKF3
IMEI: 004999010640000
Product code: GT-I9100LKAERA
Bypass MSL... OK
Repairing IMEI... OK
Repair done
Reseting... OK
Done with Samsung Tool v.14.5

[pocgoc]

Fixed by updating:
Here's the solution how.

Pre-Installation tips:

Backup your Apps and important data — bookmarks, contacts, SMS, APNs (internet settings), etc.
If you have Samsung’s PC software Kies installed, un-install it first because it may interrupt the flashing process.
Drivers! — it’s important you’ve the proper drivers installed. Download links below: 32 bit (x86) Windows | 64-bit (x64) Windows

Install XXKPA Firmware on Galaxy S2 to get Android 4.0 ICS

Download XXKPA firmware. Filename: I9100XXKPA_I9100OXAKPA_OXA.rar. Size: 353 MB →Download Link. [password: ****************]
Extract the downloaded file ‘I9100XXKPA_I9100OXAKPA.rar’ of XXKPA firmware to get these 7 files (the file-names may end with .tar instead of md5 as the file extension is hidden, so don’t worry):
GT-I9100-MULTI-CSC-OXAKPA.tar.md5
I9100_CODE_I9100XXKPA_CL51925_REV02_user_low_ship. tar.md5
I9100_EFS_I9100XXKP9_CL45181_REV02_user_low_ship.t ar.md5 [not to be used]
I9100_KERNEL_I9100XXKP9_CL45181_REV02_eng_mid_ship .tar.md5 [not to be used]
MODEM_I9100XXKPA_REV_02_CL1094591.tar.md5
Odin3 v1.83.exe [For windows only. Double click to run this file when asked in step 5 below. Admin privileges will be required!]
u1_02_20110310_emmc_EXT4.pit
Disconnect your phone if it’s connected to PC. Switch Off your phone. Wait for vibration to confirm complete switch off.
Now, put the Galaxy S2 in Download Mode — press and hold these keys together: Volume Down + Home + Power. You’ll get an options screen. Press Volume Up now to go to download mode (which is also called Odin mode). This is required to install the XXKPA (or any other firmware) using Odin PC Software.
Open Odin (from step 2.6) — double-click the Odin3 v1.83.exe.
Connect your phone to PC now. You should get the message “Added! !” under the Odin’s message box in the bottom left. If you don’t get this message, then probably there is a problem with drivers. Make sure you’ve proper drivers installed. See point 3 above under ‘pre-installation tips’.
Select these files in Odin at respective tabs:
Click the PDA Tab, and select I9100_CODE_I9100XXKPA_CL51925_REV02_user_low_ship. tar.md5 (from step 2.2)
Click the Phone Tab, and select MODEM_I9100XXKPA_REV_02_CL1094591.tar.md5(from step 2.5)
Click the CSC Tab, and select GT-I9100-MULTI-CSC-OXAKPA.tar.md5 (from step 2.1)
Click the PIT tab, and select u1_02_20110310_emmc_EXT4.pit (from step 2.7)
Important! On Odin, make sure Re-Partition, Auto Reboot and F. Reset Time check boxes are selected. Do not touch any other check box or tab or anything, except as was required in step 8 above.
Double check everything said in step 7 and 8 above. [And, do not use the files in step 2.3 and 2.4 anywhere in Odin].

Now, hit the START button to start flashing of XXKPA Android 4.0 firmware on your Galaxy S2. When the XXKPA Android 4.0 firmware has been installed by Odin on your phone, your phone will automatically reboot — and when you see the Samsung logo, you can safely unplug the cable. Plus, you’ll get a PASS (with green background) message in the left-most box at the very top of the Odin. In case it says FAILS (with red background) or nothing seems to be happening, check the Important Note below after step 11 to know what to do.
When it has restarted, your Galaxy S2 will be running Ice Cream Sandwich (ICS) with version being Android 4.0.3, build being XXKPA and Samsung’s custom UI TouchWiz 4 atop it. Check out your Galaxy S2’s android version here: Settings » About Phone.

IMPORTANT NOTE: If Odin doesn’t seem to be progressing/doing anything for more than a minute, or fails to complete the process, do the following:

Disconnect the phone from the PC, close ODIN, remove battery, re-insert it, turnphone on in Download mode again, and do the procedure again from Step 5.

My new IMEI appeared straight away from my previous tries of z3x