When in a hotel and the wifi is down, I tether data to my netbook with my Android.
Here is what invariably happens. Only if I have a 4G data signal can I tether data and take voice calls on the phone at the same time. If I have 3G or less, any calls that come in break the data connection.
Sooo, if I don't have a 4G signal, my phone rings like crazy. Everybody and their mama starts calling me. That phone will sit quietly for days until I want a little net time, then kaboom! Ring city! Data stops.
I'll just have to start answering it by yelling, "WTF you want? Oh, sorry, mom." 😀