I've faced this once before. Out of the blue, the network is not available with status "Emergency Calls Only".

After making a call to their hotline (of course using another phone), they admitted to make a mistake of "accidentally" barring my line instead of someone's else account.

So, just make a simple call to their CS to verify before wasting time at kiosk...

Same issue for me 2 months back, but it is bcoz of SIM card faulty out of sudden, need to pay to get replacement..

RM10.60

I've faced this once before. Out of the blue, the network is not available with status "Emergency Calls Only".

After making a call to their hotline (of course using another phone), they admitted to make a mistake of "accidentally" barring my line instead of someone's else account.

So, just make a simple call to their CS to verify before wasting time at kiosk...

Same issue for me 2 months back, but it is bcoz of SIM card faulty out of sudden, need to pay to get replacement..

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I think it stands for North America Digital Goods and Services Tax imposed by certain states in USA. .......
https://translate.google.com/translate?hl=e...384&prev=search - State Tax iTunes and Other Digital Downloads 2020 - How States Tax Digital Goods and Services (iTunes Tax and Beyond) - Will's Whiteboard (February 2020).

Maybe your grandfather purchased something online from USA.
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Better call U Mobile.  Seems like U Mobile users (and no other Malaysian telco) have encountered this before.

https://www.google.com/search?sxsrf=ACYBGNR.....0.71QlMFhtYp4

I have no issue with that. As long as coverage is ok then should be fine.

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According to azhar75 , TAC via SMS does not work well in 4G for UMobile = use 3G/HSPA+ to receive TAC, ie iirc, need to switch on Airplane mode, switch from 4G to 3G, switch back off Airplane mode and switch back to 4G after received TAC.

If  restarting phone works to receive missing TAC, can also.
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Only in umobile or what? I never fails to receive tac or otp sms.

No issue whatsoever with LTE for TAC.

BTDT... The weird part is it happened since September 2019 (from my observation...). Of course this "tragedy" is "isolated" for some unknown reasons... My hypothesis is that the "hand-shake" between cell towers is not properly configured...(?)

We can test this by not moving from one location to the other. The TAC will come through under LTE spectrum if static at one location/cell tower (provided the 1st successful TAC is under LTE). But once we move out to another location/cell tower, the TAC "most" probably cannot go through for some unknown reasons until we switch to HSPA spectrum or restart the device or turn on/off Airplane Mode. Me had opened "monthly" report/complaint to UM Careline but no "positive" outcome.

Me might be trying to see/test if MNP-o and MNP-i back to UM will solve this problem or not. Next 2 months (most probably), me will MNP from CUP35 back to GX38.

What was the question?

I don't think so I mean 4G sim are compatible with 5G my experience with Digi postpaid. I can't say for umobile though. Best if you email their support.