Question

how can i de-register dstv account in South Africa so that i can register with DStv Zimbabwe using the same decoder?

Answer 1

It depends with where you bought the Decoder, if it was directily from Multichoice SA themselves then you will need to follow @tzanswer's suggestion if you bought if from another vendor or third party then you can just register it at the local Multichoice Agency as if it were new. Just copy the Decoder's serial and the Smart card number and take them with you to the nearest Agent. No one has to know that you used an SA account

Answer 2

You have to visit Multichoice South Africa first to have it de-registered there. You will have to have an affidavit from the previous SA owner to prove that they sold/gave it to you.