I am considering the tmobile at home option to use voip for my residence. Would like to use this for business application with fax send/receive. My only option for connectivity here is dial-up or charter cable, and will not consider bundling with charter. I noted on a previous thread using battery backup for the modem/voip router would help with power failures. Are there any issues with this tmobile service or with voip phone service in general I should be aware of here? Pete Cassebeer Easthampton