My impressions of the two phones: Droid X Pros: Cheaper (free), good battery life Cons: No 4G LTE, end-of-life 3/31, less resale value? HTC Thunderbolt Pros: 4G LTE, lock into 4G unlimited plan, better resale?, more responsive?, future-proof? Cons: costs $200 more, poor battery life I've decided to upgrade my basic flip-phone and move onto my first smartphone: either the HTC Thunderbolt or Droid X. My smartphone experience is limited to a 3 week trial with the Droid X back in Jan 2011. I'm going on a trip to Seattle/Vancouver at the end of April and would like a new phone by then. I live in an area with 4G (SF) and played with the Thunderbolt at BestBuy over the weekend. The TB seems a little more responsive than my memory of the Droid X, but I can't tell if it's actually true or a placebo effect. The screen also seems a little nicer but again, I can't tell if it's just a placebo effect. They didn't have a working Droid X for me to compare there. When I borrowed the Droid X, I was mostly on wifi and rarely on 3G. However, I don't think I had enough time to become acquainted with all the smartphone features/functionality. This said, I don't know how much I'll be able to take advantage of the 4G/LTE network. I'm hoping I can rely on experienced users here to guide me through this decision. If it helps for you to know, I'd consider myself a heavy daily Internet user: ~8 hrs @ work and ~4 hrs @ home. I'm not a social media person but I do like to "research" things when I'm out (i.e. Wiki/Yelp). My biggest complaint with the TB is the battery life. From early reports/reviews, it sounds like I'll need to recharge the TB after 6 hours of medium usage. Battery life is important to me and I recall the Droid X being able to go 1.5-2 days on a single charge. My concern with the Droid X is future-proofing. The Droid X is free with a 2-year contract, but I'm worried about being stuck on old tech for 2 years. I'd be okay with a 1-year contract on the Droid X, but it will cost me $220/170 for the phone. At that price point, I could just get the TB. Do you guys think there's any valid concern with being "stuck" with a Droid X after mid-2012? Or do you think I should try to lock in the 4G unlimited plan with the Thunderbolt?