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 514 of 4219 in Telecommunication
G-03A, Ground Floor, Danga City Mall, Jalan Tun Abdul Razak, Johor Bahru, 80000, Johor