ya.. same goes to my 1st month... 1 week then i'm over my credit limit which is 200mb.. coz i tried using tethering with iPhone.. so i thought i overused it that day.. but my usage still below 400mb
when the bill comes it said i used 590mb... they charging me rm100+ for the 90mb.... zzzz
I can't check when i overused or how i overused it... so I just becareful this month and keep on checking my balance and data usage... ><"

i used on fb all nights just used up around 15mb (including upload)
so i guess if beejive or other im should be around like that too....

btw... just checked my balance... this month my pay is stick with 100... but i only used not more than 300mb.. a bit of wasted the remaining data i have but atleast i'm saved from overcharged this time = ="