tested 2 telco, from maxis to celcom (3weeks) then back to maxis :

maxis : call drop and sound breaking very often, even in klang valley.. make call when in car? bttr dont or u be mad.. lol.. as for data plan, far better than celcom.. wide LTE coverage and quite stable..

celcom : been their cust for 3 weeks, call is good.. no prob making call when moving around.. but their internet is very very poor (cyberjaya, seri kembangan, KV).. cant even get stable 3G/HSDPA.. dont even mention LTE..

since internet is more important for me, am returned to red clan..