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I'm not sure if this is really necessary for anything other than Samsung phones, but I've only ever seen this issue come up when dealing with Samsung phones. Here's a scenario: You're messing around with the various settings in your phone's menu, and you switch your phone to NAM2 in the process. Your phone resets, and you find that your phone is now locked. Unfortunately, your normal lock code doesn't work. What do you do?
First off, you should probably understand what NAM1 and NAM2 are. Basically, think of them as containers. Each of these "containers" holds a phone number. Yes, you can have two phone numbers on a single cell phone. I generally don't recommend it, though, as you can only have one of the two numbers active on the phone at any given time, meaning that you'll miss all of your calls on the number whose NAM you're not on at the moment. Also, NAM2 generally can't accept over-the-air programming, so you'll need to manually program your account information into it, and you'll need to have updated roaming information loaded into your phone in one of your carrier's retail stores (assuming that they even support NAM2).
So, why am I telling you about NAM1 and NAM2? Well, your default lock code (assuming that you never specified your own) is generally going to be the last four digits of your phone number. Problem is, NAM2 doesn't have a phone number in it by default, so you'll need to somehow figure out what the default lock code is set to on NAM2.
Secondly, you'll need to locate a hexadecimal code, usually found inside of your phone's battery compartment. There are two different types of hexadecimal codes that you'll need to be on the lookout for: ESN and MEID. Now, Samsung phones generally don't have these numbers labeled, but it's easy enough to find them. An ESN in HEX format will be eight characters long, whereas an MEID in HEX format will be fourteen characters long. MEID's tend to begin with the letter A from my experience.
Now, depending on which type of hexadecimal code you found in the previous step, you'll need to take one of two different paths in determining your unlock code...
Let's start with the easier path, the ESN...
Thankfully, all you need for this one is a scientific calculator. If you're using Windows, then simply launch Calculator. Once you've launched Calculator, you'll want to choose View > Scientific from the menu bar.
Once you're in scientific mode, click on the Hex radio button, then enter the eight-character ESN.
Now, click on the Dec radio button to convert your ESN into DEC format. Now, do bear in mind that this won't be the same as the ESN number in DEC format on your phone's battery compartment label. That's why only the ESN in HEX format is important. Anyway, the last four digits of the resulting number are what you'll want to enter in order to unlock your phone.
Now, let's move on to the slightly more involved path, the MEID...
Really, the only reason that I consider this to be harder than the previous path is because it requires a tool that isn't available on most computers by default. Basically, you'll need to find a hash calculator, specifically one that's capable of working with the SHA-1 algorithm. You don't really need to understand what the SHA-1 algorithm is in order to unlock your phone, but - in case you wanted to know, anyway - I suppose that it'd best be described as a method of making pieces of code more secure. SHA-1 and other similar algorithms simply make changes to code in order to make said code more secure.
Anyway, I'd recommend HashCalc, as it's free and easy-to-use. Once you've downloaded and installed HashCalc, launch it. Change the Data Format option to Hex String, then enter your fourteen-character MEID. Be sure to check the SHA1 checkbox, then click on Calculate. See that long code that appeared to the right of the SHA1 checkbox? Write down the last six characters of it, as they'll be vital in determining your lock code.
Now, this next part will look more than a little familiar. Basically, you'll want to have a scientific calculator for this, just as we did for the first path. Again, in Windows, you can simply launch Calculator and choose View > Scientific from the menu bar.
Once you're in scientific mode, click on the Hex radio button. There's a problem, though: We don't have an eight-character code to put in as we did before, and we need an eight-character code in order to figure out our lock code. Well, thankfully, the first two characters in the eight-character code are always going to be 80. As such, your eight-character code will be the number 80, followed by the six characters that you wrote down after using HashCalc. Now that you have an eight-character code, input that code into your calculator.
Now, click on the Dec radio button. As before, the last four digits of the resulting number is your lock code.
Dial *22899 and press SEND to program the phone.
after it has finished downloading the programming information, the phone will reset.
The Lock code will now be set to the last 4 digits of your phone number.
when you have finished, be sure to switch back to NAM1 and dial *22899 again to re-program it.
same thing happend to me. DO NOT!! i repeat DO NOT! call verizon! they will waist ur time! just follow these instructions: go to the dial screen and dial: #43574357* Then 3 options will pop up. click on VERSION then scroll all the way to the bottom and the passcode is the platform id. i hope i helped you out! =)
Dial *228 and press send. Listen for the prompt and press 1 to program
your phone. Remain on the call while your phone is programmed (could
take up to 2 minutes). Do not hang up until you hear, 'Your phone has
been programmed successfully."
Ok i sent an email to sumsung and i got this response
Thank you for your email. If you switched the NAM to NAM2 you will need to calculate the code. Listed below are the steps on how to do so: 1.Obtain the Hexadecimal ESN of the phone. The ESN should be printed on the sticker on the back of the phone, under the battery. The Hexadecimal ESN is the one with letters and numbers. 2.Open Windows calculator by going to Start -> Run -> type in "calc", then click OK In the Calculator, click "View" then "Scientific". 3.Click on Hex and type in the Hex ESN 4.Click on Dec for the decimal conversion and use the last four digits for the code on the handset 5.Once the code is entered and the menu can be accessed, switch the NAM to NAM1
If you know your original lock code, take it in to your service provider, each code is diffrent and can only be programed manually, if you dont know your original lock code you will have to sacrific all info pics,mess,numbers, etc. by a reset... I can guide you through the steps to erase all if you lost your Unlock code, or switch back to nam1 if you know your lock code, ( when you switch back, if security is on automatic lock, password is required) intial programing code is not your Unlock code.