It refers to the excess traffic deduction fee after the traffic in the package is used up, or the traffic in the package can only be used locally, but the traffic deduction fee generated by the Internet in other provinces. According to roam, namely produce buckle takes place as number belongs to outside, provincial representation is in another province. Specific number traffic usage, can consult the local customer service to verify, can log on to online business hall also view the related usage: login\/home page click on online business hall calls query query > > bill list query > Internet traffic, you can query within six months of mobile Internet notice details.