http://www.phonearena.com/news/T-Mo...you-share-a-number-across-devices-too_id74759
Many people have multiple devices these days, but carriers have traditionally wanted to get as many individual subscriptions as possible, which ends up meaning multiple SIM cards and multiple phone numbers for each device. Google Voice attempted to give users a better way, but few people jumped on that. AT&T announced something close with "NumberSync", and now T-Mobile and Sprint want to offer a better way to let you share a number across devices.
Many people have multiple devices these days, but carriers have traditionally wanted to get as many individual subscriptions as possible, which ends up meaning multiple SIM cards and multiple phone numbers for each device. Google Voice attempted to give users a better way, but few people jumped on that. AT&T announced something close with "NumberSync", and now T-Mobile and Sprint want to offer a better way to let you share a number across devices.