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i deleted my contacts by mistake plss help me to get them
I don't suppose you had backed them up before you deleted them, did you...? If so, you shopuld be able to restore them. If not, I can think of no way of getting them back and I think you'll have to put them back in manually. If the latter is the case, do make a back up as soon as you can. It will save you a lot of trouble if this ever happens again...
If you have a gmail account and if is sync to your phone just maybe you have a backup of your contacts, but again if you didn't you will have to re-enter them all, you should use both Gmail Contacts and SE Sync just to play safe.