mine is ok. smart prepaid on redmi note 4.
at home batu caves, gombak all ok on 4g. at work kl sentral also no issue.
subscribed lots of data. never wasted. lol

Digi at my house and workplace quite ok.

Before this barely manage to get 4G signal but after complain the 4G coverage get better.

I can get quite a decent 4G speed. Around 10-15Mbps download.

I live in JB.

City not necessary got good data connection. Maybe it's equipped with 4G data but sometimes the data is not usable! (Data not jalan at all)