I have a locked sim on my ipad

• It is the sim card that is locked I presume.
• Go to settings
• Then to Phone
• There to Sim pin
• To Change Pin

Follow the instructions
If/when you are asked for the puk number then contact
your service provider who will give you a puk number.
If you follow the instructions your phone will function again.
good luck
kolbrun

It must be a G3 or G4 iPad. The sim is locked and you need a PUK. The puk was on a card with the sim that went in, together with the initial pin. When someone locked you phone to tablet, by entering the pin (for the sim) wrong, 3 times in a row, you can unlock it with the PUK.
If you can't find the PUK, goto a store of your provider. Sometimes they can give you the PUK and if not, they can give you a new sim, with a new pin and puk, and put your number on the sim.
That should be all.

There is no such thing as a free imei unlock code. If you need to unlock the sim in your iPad. (imei is connected to they Sim card) you can ask the provider to give you a new sim card with the same number. the new card has a new imei, new pin and new Puk.

Your iPad 2 must have 3G, with a sim card. For the sim you need the pin and after 3 misses you need the puk. The puk is on the letter or card that came with the original sim card. On that letter is the pin and puk. sometimes you have to scratch away the metal layer.

If you want to unlock an iPad, with the lock code on, and forgot your pass code you have to enter the correct password that belongs to your Apple ID. It will be partially on the screen. If you really messed up, setting up security, and lost unlock code and your Apple ID password. Only Apple can help. For that you have to take iPad, invoice, Prove of your identity (Passport) to the Apple store and hope they will unlock your iPad. With iOS7 Apple mede a very good security system. And while setting up the iPad and the security, you are warned several times what to do t make sure you and only you could enter the system.
Be aware if Apple does reset your iPad, all data now on the iPad will be lost.

check your sim certificate or your service provider will help with that

you can find the PUK & PIN only on the package or SIM-card holder which came with your SIM-card - see photo

Step 1: Look in your SIM card wallet. Most network providers will give you your PUK code on the SIM card holder and instruction manual/ package when you buy the phone. Others send the code through the post in your welcome pack.
Step 2: Contact your network provider's customer service team. If you can't find your PUK code in your SIM card wallet, contact your network provider. It will confirm that you are the account holder and provide you with your PUK code. However, remember you will need another phone to do so
Step 3
Visit the network service provider's website, where some networks will allow you to access your PUK code online. Networks such as AT&T require customers to sign into their online account before accessing their PUK code. However, others simply require you to enter your phone number before displaying your PUK code.
What is PUK

PUK can be obtained from your service provider. Please call them and detail your issues, they may ask for your SIM card details, so have it handy.

I am afraid you will have to work with your mobile provider for assistance.

http://optus.custhelp.com/app/answers/detail/a_id/209/~/how-to-get-your-puk-code

Yes! It is possible to unlock iPad (or other iOS devices) now. And if you prefer an easier way to get the job done, see how you can achieve it on your PC or Mac on your own from this website: automaticiphoneunlocker.com