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 31 of 4219 in Telecommunication
YES DEALER JALAN STULANG LAUT K3 108, JALAN STULANG LAUT, JOHOR BAHRU, 80300, Johor