As you may know, PUC stands for Personal Unblocking Code Your phone will ask for a PUC if you have entered the CIM card PIN incorrectly a number of times. You need to contact your operator who will give this to you. You cna read all about PUC codes here: http://www.unlock.my/unlock-codes/unlock-codes-for-a-samsung-galaxy-tab-special-investigation-2/
