Hi to all... My problem with Celcom is even worst. Go bluecube want change sim card due to my existing sim was too old yesterday. CS said system slow so just give me the new sim and wait until old sim don't have any line. Today morning old sim don't have 4G data anymore. My work need data so change to new sim but the problem is can't call in or out anymore while only got 4G service WTH... Change to new sim also can't due to their system problem. They report to IT department for this issue. So now only internet call can get through and can't received any TAC from internet banking. Told to wait 24 hours. Haish....

I bought originally from prepaid sim on 2012 la. Its over 10 years already. Around 2016 converted to postpaid but not change the sim that time.