I have considered switching to Sprint, but my daughter lives with my ex-wife in another town which is only served by Verizon. To keep from having contract termination problems due to excess roaming, could I buy an Airave to install at my ex-wife's house for my daughter's phone? If so, is it possible to buy another Airave if I have reception problems in my house (e.g. my basement) or would I be limited to just one unit?