The strongest coverage and signal you can get is in Skudai, Johor Bahru area and also Pasir Gudang. You can also get fair coverage in Batu Pahat and Muar instead of other state is partially poor.
Rank 516 of 4219 in Telecommunication
P28-1, Level 1, KSL City, No.33, Jalan Seladang, Taman Abad, Johor Bharu, 80250, Johor