Never repaired The Phone has never been in anyone else's hands and the IMEI number i found was by pressing *#06# ... So i dont think that the IMEI is Wrong ... Sir..When i enter the code given by you ... even after 15-20 minutes it says that the lock code entered incorrect 5 times it will  unblock in 5 minutes... but i entered only once and even after entering  that code once, it says so... That means ...the code u gave me is  something... but may be something else is also wrong with the phone... shall i upgrade the firmware by NSU...again...Will it reset the code to 12345 Please Help

Dial using the keypad: * # 0000 # - the version number displayed on the display.
V 5.16
22-06-99
NSM-1
V 5.16 - software version
22-06-99 - date
NSM-1 - The hardware (model)
View IMEI
Dial using the keypad: * # 06 # - IMEI number is displayed on the display.
SimClock
Allows you to check whether your SIM-card mode StopClock. When transferring the card to this mode significantly reduces power consumption and thus increases the work of the battery. Generally, all modern SIM-cards support this mode.
*#7780# reset to factory settings.
*#67705646# This will clear the LCD display (operator logo).
*#0000# To view software version.
*#2820# Blue tooth device address.
*#746025625# Sim clock allowed status.
*#62209526# - Display the MAC address of the WLAN adapter. This is available only in the newer devices that support WLAN
#pw+1234567890+1# Shows if sim have restrictions.
*#92702689# - takes you to a secret menu where you may find some of the information below:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)
*#3370# - Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better signal reception. It also help if u want to use GPRS and the service is not responding or too slow. Phone battery will drain faster though.
*#3370* - (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.
*#4720# - Half Rate Code activation.
*#4720* - Half Rate Code deactivation. The phone will automatically restart
If you forgot wallet code for Nokia S60 phone, use this code reset: *#7370925538#
Note, your data in the wallet will be erased. Phone will ask you the lock code. Default lock code is: 12345
Press *#3925538# to delete the contents and code of wallet.
Unlock service provider: Insert sim, turn phone on and press vol up(arrow keys) for 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin#
*#7328748263373738# resets security code.
Default security code is 12345
SIM Clock
Stop allowed
Warranty Codes
* # 92702689 # [* # war0anty #]

i forget the password my phone, this is IMEI number 354893/06/015267/5
354894/06/015267/3

Harry, Do you want the serial number of your phone or the IMEI number? The former is usually found on the box that the phone came in or underneath the battery. The latter can be found by searching online "imie number". The rest is up to you.

si no. or IMEI no. both are printerd in back side of your mobile that means under the battery. if no means press *#06# to display your IMEI no.

insert code :
*#92702689# - takes you to a secret menu where you may find some of the information below:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)

and

View the firmware version of the phone
Dial using the keypad: * # 0000 # - the version number displayed on the display.
like this example :

V 5.16
22-06-99
NSM-1
V 5.16 - software version
22-06-99 - date
NSM-1 - The hardware (model)

View IMEI
Dial using the keypad: * # 06 # - IMEI number is displayed on the display.

i hope this helpful
thank you for using fixya

found a couple of sites that may be able to help u. GL http://www.cellunlocker.net/blog/2010/06/how-to-unlock-sony-ericsson-t715a/

Hi the IMEI number is the phones identification number, now if the phone works and you can switch it on then on the main screen just type in this star hash 06 hash so on the phone it will look like this
*#06# then when you press the last hash it will display the phones imei number, if the phone dont work then the imei number should be written on a sticker under the battery, the imei number is also located on the sticker on the box, failing that the only other way to get the phones imei number is by taking it to a phone shop and ask them to flash the phones details for you and ask for the imei number.

let me know how you get on or if you need further assistance ok

plz rate this solution as i have a whole page of unrated posts, thanks

dial *#06# in the keypad.you will get.

Yes you can use NSU ,if you are knowing how to use it because i think the code i genearated for your mobile is not working ,it may happen ,it is not necessary that the code generated by my will work on all the mobile.....ok
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Please let me know your feed-back.

Thanks
dilipbagdi
Technical Associate

give me IMEI number just press *#06# and you will see 15 digit number give it to me i will unlock your phone 100%

But dont insert sim card when it shows insert sim card then press that code *#06#