Every mobile data plan has FUP.
So called unlimited data plan not really unlimited if you have extraordinary data usage.

I thought 5G access is only from DNB tower.
4G data is only accessible from respective telco tower.
Maybe I am not as updated as you are.

Yes, I guess so. 4G towers are congested as 99% of users are using 4G data and only 1% as reported are using 5G data.

If I have not mistaken, the mobile phone telco towers signal is to "communicate" with the customers via the mobile phone or gadgets.
Each towers are connected via fiber to communicate with the telco server.
Speed connection from tower to the server via fiber is fixed, say 1Gbps.

If 1000 users are using the same tower at the same time, eg., downloading/streaming, sure the speed will be disappointed, because 1Gbps divided by 1000 users.

With the demise of 3G as instructed by Moo govt, most telco are forced to activate Wifi Calling.
Before that, 4G is for data/surfing and 3G is optimised for making calls.

When 4G is now tasked for calls and data/surfing, sure it will be congested and performance will be cursed.

MaxSHIT was the last telco to activate VoLTE because it will make its 4G performance worsen.
In short, not enough data capacity on its 4G network and that's why its monthly plan always come with lesser data quota compared with other telcos.

This post has been edited by pokemon: Aug 12 2023, 11:56 AM