Samsung sgh-t340g unlock code

SOURCE: Unlock my Samsung SGH-E530 phone

i need help to sim unlocked my samsung SGH-E530 phone?

SOURCE: Unlocking game codes of my cell phone model Samsung SGH-L700

SGH L 700 game name tetris manai [288 kb] locking code

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The following is a known process for Samsung phones to unlock the restrictions.

If you want to unlock your phone put a sim from another company then type *#9998*3323# it will reset your phone. Push exit and then push 7, it will reset again. Put your other sim in and it will say sim lock, type in 00000000 then it should be unlocked. Type in *0141# then the green call batton and it's unlocked to all networks. This code may not work on the older phones and some of the newer phones. If it doesn't work you will have to reset your phone without a sim in it by typing *#2767*2878# or *#9998*3855# (not tested)

If this doesn't work you will need to post the IMEI number which is located under the battery for further help.
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See if you try the below

SOURCE: i need the unlock code for samsung SGH-t469 or master code

When you place a new or a existing SIM card from another phone provider into your mobile phone and it asks for a Security code then :-
This phone is locked to the original mobile phone provider. You need to contact this mobile provider to ask for the unlock code (security code) for this phone. You need to provide proof of ownership etc and the phone's unique IMEI number which is located inside the phone under the battery. They use this number to generate the unlock code for your phone.
They should provide you with instructions on how to enter this code into the phone.
Once you unlock the phone, then you can insert a new SIM card in this phone.