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How to check if your samsung device is locked to a network provider or not:
Start the phone ON with any non-accepted SIM card (Non Accepted Simcard is any SIM card not from the original provider)
If he phone will automatically display that your current SIM card requires an unlock code. Would you like to unlock it? that shows the phone is locked. If the phone is unlocked other network provider SIM card will work fine.
A gsm can be locked the SIM card is NEVER locked!! The SIM itself is
never locked: you can use it in any compatible unlocked cellular phone.
There are 3 different kinds of simcards for mobile phones. Two 2G
cards; a 1.8 Volt version and 3.6 Volt version. All newer sims are 3.6V
versions. Some real old phones (older then the year 2000) have trouble
handling the new simcards. Next to this you now also have the uSim(also
referred to as 128k sim), this is a special simcard for UMTS phones and
has more space to save contacts and text messages.
Different kind of locks. There
are different kind of simlocks, this depends on the brand but there are
a couple common kinds of locks which are often used. Sim lock -> Locked to 1 simcard Operator lock -> locked to one operator (provider) Password lock -> GID lock you have to have a code to unlock this lock. Other
locks are 'Wap lock', 'Mp3 lock'. Sometimes the names of the different
locks are just different. For example; the term NCK code is same as
network (operator) unlock code. Note: a 'security code' or a 'user
lock' is not a simlock! It is like a pin code only then not saved on the
simcard but on your phone. This is usually a 5 digit number which the
user of the phone has to set. This code can however also be reset by SRS
Hello,the truth is that you can unlock the phone ,but you can't unlock all phone for free.The payment sites are very cheap you could try it out and see.You can the link below to unlock . Note: unlock is not free, You will be charged to get your unlock code. The only way by which you can get the unlock code for free is by calling your service provider and requesting for your unlock code. If you service provider refuses to give it to you, then there is no other place where you can get a free unlock code.
Visit the links below if you are interested in buying the unlock code: