Zawnet my reason for wanting to go to KLIA2 is two-fold: For the few hours I would be staying, the Capsule Hotel seems to be more budget friendly. Secondly I want to pick up a SIM card at Celcom in KLIA2. My research tells me Celcom has the best (or almost only) coverage in outlying areas such as Mabul Island where I will be spending a week. I will have limited time in Kota Kinabalu. I didn't find a Celcom location in KLIA and the other providers don't have coverage in Mabul.