[PJD642]

I'm in an area where I don't get a great signal inside my house. I've debated purchasing a network extender, but my question is this: since it's 3G, once I get a BB10 phone (4G), will the extender be pointless? I believe the 4G phones revert back to 2G/EDGE if they can't get a 4G signal, and the BB10 phones (and most other 4G phones out now) don't have 3G antennas. Can anyone with experience in this area give me an answer?