My son was in KL with $15 SIMBA's PrePaid SIM.Not SIM problem, the outage is timed, between 10+pm and 12am only. Unless it is an AI SIM card that knows how to choose when to be faulty.
The signal connection is full bar too with SMS and voice call working, only no data connection within that 2 hours for the last 2 evenings. It has to be Simba's side issue.
Sunday night about 15 mins before midnight he tried to call me over 5 times but he couldn't get thru - calls get terminated.
He used Whatsapp & the normal/default way of calling, both unsuccessful.
But I received missed calls notifications on my phone's Whatsapp, but not on the default phone app.
FYI

