These work well, I have an ATT in my house. However, in a broad deployment (like in a datacenter with lots of discreet visitors) it is pointless, because ATT requires registration of any phone connected and it is limited to 10.
I just with Wifi calling was ubiquitous. > Assuming you have good Internet service, you might also consider femtocells, > which are small cellular base stations that use your Internet service as > backhaul. > > Verizon: http://www.verizonwireless.com/accessories/samsung-network- > extender-scs-2u01/
