maybe i was too late to know, after like 2+ years went back to Johor. whatever config i do, my Hotlink remained in EDGE and won't even 3G. the EDGE service is totally junk. eventually found out that i have to replace my sim with 4G (to keep my number), as 3G decommissioned in malaysia last Dec 2021. 2G they will continue to retain for voice/sms.
now gotta arrange to visit a Maxis Centre. or maybe just get a new hotlink sim just for data purposes.
also noticed that some prepaid sims being sold now got 8 numbers (01x12845678)... there are still 7 numbers being sold.