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First you’ll need to get your Network Control Key. The Network Control Key is a 8 digits unlock code. There are two paths to get your NCK. You can either call AT&T or ask for it. You may have to ask them to put you through to their tech department. If you’ve never signed up for AT&T’s Service they may not give the code because your not a customer. The other way to get the code is to contact a cell phone unlocking service. They usually charge around $20 to get this code for you.
Once you get the Network Control Key power off the phone.
ATT tech support & several web forums confirm that sending a SMS from your computer via an IM, (like Yahoo Messenger,etc.) to a PDA cellular is web based and requires a data plan. However, you can send a text message via email to cellular phones and receive replies. It is easy and just as fast. You have to know the recipients carrier to obtain the proper email address. For instance, to an ATT phone the address is: email@example.com Remember that most carriers have a character limit (ATT is 160).
See this link for a complete list of other carriers & email addresses- http://www.mydigitallife.info/2008/10/28/send-free-text-message-with-hundreds-of-email-to-sms-gateway-or-internet-web-sms-from-operator/
Is this phone from the same service provider as your simcard? If not, not all phones are unlocked to work with the sim cards of rival companies. If both the phone and sim card are from the sam company, then you can have the company replace your sim card. They usually do this for free as a courtesy as long as you explain the problem to them. Hope this helps
att just used that as an excuse not to unlock the phone. you can purchase a smartsim card on ebay that will unlock just about any gsm phone including the BJ. You use it in conjunction with your sim and it works great.
you need to get an unlock code. If you are using a different sim that uses a different network to the one that the phone was made for then you need to get it unlocked to recognise your sim. If your network provider cannot provide you with a code there are plenty of phone repair shops that unlock phones very cheaply.
1. Turn off your phone, and remove SIM and turn it back on.
2. At the wrong card message, type *#9998*3323#. A message will pop up
telling you to press exit, so hit the right softkey. Choose number 7
(or 8 or 9 work, I think). Your phone will reboot and your SIM will
3. Type *0141# and then hit call. This will give you a message saying your phone is personalized.
4. Power down your phone and insert a SIM card other than the one that is in it. Power back up your phone.
5. At the SIM code prompt type 00000000, that is 8 zeroes.
Well, no. Your sim card must have taken a big jolt to it in order for it not to work. Simple, you need a new one. Got a Sams club near you? They should be able to give you one for free, att corporate stores charge 25.00. But sorry to say you need a new sim.
Are you referring to a sim lock? This means that you cannot use your phone with another providers service unless you unlock your phone. For example, if you have a tmobile sim you cannot use at&t sim card until the phone is unlocked. I would suggest doing a google search on cell phone unlocking to find a company to unlock your phone.
It depends on how you've acquired the phone.
1. If you are an AT&T Wireless user and you have the phone on contract, AT&T is legally obligated to give you the unlock codes. Just call AT&T Wireless customer service at 1-800-888-7600 and say you want the unlock codes. Most of the time they can give it to you over the phone.
2. If you purchased the phone second hand, you're basically have to pay someone to unlock it. I'm haven't personally used these services, but they do work for the most part. I suggest two different methods:
a. Type in "unlock samsung blackjack" into Google. Pick your favorite provider.
b. Type in "unlock blackjack" into ebay, pick someone with a good reputation so you can feel more confident than a random website.
It should run you $15-$30.
Once you have the unlock code, most of the services will give you instructions, but it's pretty simple with the Blackjack. Just put in your new T-Mobile SIM and a box will tell you to enter the unlock code. Just enter the code at that point and you should be ready to go.
Hope that helps!