The immediate family and a few members of the extended family went to Universal Studios Orlando for the Thanksgiving holiday, and I had an interesting issue with 3G/4G service and battery life on my HTC Evo 4G. Even though I had active 3G coverage in the area, and 4/5-5/5 bars on my phone radio, my battery was draining down to nothing in about 3 hours. I wasn't running my phone any differently than I do at home. It was really weird. Then I tried to send a photo MMS to my daughter (she was with us) who has an new iPhone 4s, and she couldn't receive it. Never happened before. All of the family was complaining about slow data/internet speeds on the phone. I couldn't figure out what was going on, but it was ticking me off. Then it occurred to me as I looked around the park -- EVERYONE has a smartphone. EVERYONE. About 3% of the people had cameras, and 97% of the people were using their phone cameras, and texting, and Facebooking, and Tweeting, and surfing, and, and, and, and... It was a bandwidth issue! Now here's the funny part -- normally, I avoid using 4G because it's such a battery drain. I turned on 4G and got a 2/3 bar signal, my battery drain slowed down to almost what it typically is on 3G, and my response time for anything internet was instantaneous. Never been so happy to own a good ol' WiMax 4G phone! Apparently, few people are using it because my bandwidth issues disappeared! Long live WiMax 4G!