more like, when one was 400 meters or more from the antenna, signal was noticeably weaker inside a house then outside.

sounds similar to what i have read about umts installations, where they found that urban areas needed a forest of antennas, and even then the signal was poor inside buildings (but then most of those are reinforced concrete or similar).

im not sure LTE will be any better if its forced to run on the same high frequencies as wimax or umts. basically as the frequency goes up, signal penetration drops...

hell i have experienced degradation on satellite signals in heavy snow or rain, or if a tree is in the way...