Hello Everybody 

Newbie here.Subscribed U28 mobile internet plan.In before port from Digi Prepaid.
As a newbie me got a few question wanna ask.Sorry if already asking before..peace.

Signal my home so far so good..constant got H+ (me from Kuantan,Pahang).
However when i go my parents house..a littler far from town.The signal also
good..got H+.But sometime when i make/received call,signal lost and suddenly
R and Aorplane signal appear.Not so long,around 3-4 second and
back to normal signal.MY question,that normal ?. Possible the coverage not very
good if compare town area.

The day i go for UM..customer services info need Check at data roaming.
I asking her,what for ?.She tell if go some place but UM not coverage,line will be
roaming to Maxis.I read before this UM backbone now is Maxis.What i worried here
when i check data roaming,message appear..Allow data roaming?.You may incur
significant roaming charges!.I worry because of this my bill overkill.

CNY holiday go my in law village.Dun have H+ just G only.Yup..the line damn slow.
I try checking roaming and hope can get H+ (me refer UM CS info..Maxis backbone).
No luck still got G.

Also wanna ask about international roaming.Next month i have trip to Vietnam.
Trip under company.My question,how to activate/used roaming?.When used roaming,
possible charge will go high?.
Thank you for tip,info,sharing