normally umobile when no coverage it will auto switch network to celcom. It will hop over their network. Its not a big issue. Maybe the location you're in is out of the cell tower reach.

Then it will use the umobile connection instead. So that they don't have to pay maxis to use their cell tower and service..

So should propose to Umobile to rent from Maxis at Genting to accommodate more umobile subscribers. Unless they trying to tell you that you go on holiday in Genting. U don't need your data. U should focus on holiday and not your handphone.

So depends on whether they paying monthly for anywhere roam in west malaysia or they pay by per MB used by roamers..