if they have a regular internetconnection you usually should be able to play normal
allods is not a game where ping matters a lot, so even if you have 300 ping it wont bother you most likely
about bandwidth, for most things even very slow connections (16KB/s) are OK, but in crowded places like yaskers tower / novograd and arena of death you can get problems - however i doubt it will be THIS slow where you go
if you use your cellphone as modem ("tethering") be careful because some providers put "traps" like they charge you 20 cent / megabyte used in roamingareas