I recently upgraded to the Motorola XT890 RAZR after going through three Blackberry phones in five years. I have had this new phone for two weeks now and it has absolutely surpassed my expectations in every aspect.This phone is the international unlocked version of the current Motorola RAZR M, which is only carried by Verizon in the US. However, the Razr i works with GSM carriers (i.e. T-mobile and AT&T). Works with micro-SIM card. With T-mobile in the US, it runs on 3G when not on WiFi. Not sure about 4G yet, but definitely not 4G LTE compatible per Motorola specifications. I was a bit skeptical to purchase such an expensive unlocked product online and not really knowing for sure if it would have glitches or function properly in the US, but I''m so glad I took the risk.A few highlights/reviews on various features:CALLS: crystal clear reception on both ends and great speaker phone, even on the road. The rings tones are nice and pleasant.TEXTING: SWYPE feature may be enabled and disabled, but available. In any texting mode, very responsive keyboard. Even for the user who is not accustomed to a touch screen, it is super easy as the keys "pop" out on the screen and eliminate "fat finger" syndrome.CAMERA: HD-quality (back facing) and decent quality for (front facing - i.e. self portraits). Impressive and clear shots, and I dare say close to my brother''s LG Optimus G, which has the highest photo quality on the market currently at 13MP.  The video quality is pretty nice too. The camera feature is also well done in that it has its own "quick access" button on the lower right edge, so you don''t have to "dig" to find it. Really nice for those spontaneous, unexpected photos ops, which of course always happen when one is not ready!QUALITY/BUILD: Corning Gorilla glass touch screen. Looks and feels durable.Does not feel flimsy by any means. Probably could get away without a case/back cover, but probably not a bad idea to have a screen protector to reduce smudges and fingerprints.FEEL: one of the few "one-handed" devices out there. Nice and thin, probably more comparable to the iPhone 4, in terms of overall size.APPS: Does not come with an overwhelming number of Apps, which is nice because you can build up your Apps list and customize from scratch.ALARMS: It has as many options as you need, which is nice for varying workdays and weekends. Also, overall pleasant alarm sounds, which is nice. (But that is coming from the Blackberry, so my perception is skewed and anything really sounds better having said that.)BATTERY LIFE: Fairly decent. This was very important to me, personally, and not many IT reviews focused too much on this so I''ll go into more detail for those interested. Today, for example, I spoke on the phone for 1.5 hours total, played Pandora for about 2 hours, sent and received about 15 texts (some days up to 30-40), read about 10 emails, replied to 3 emails, and checked FB about three times...and the battery life is now about 40% left in the 12 hours of usage. You can always install an Android "App Killer" that terminates various Apps periodically that run in the background to optimize your battery life. Also, the product comes with a US wall plug, which the USB cord plugs into; that''s nice since you can also go between wall or your laptop/PC to charge. Also, the phone is sent with a UK plug/adapter as well (also USB compatible), so that''s handy for a trip abroad.In conclusion, if you''re looking for a durable, high-quality, practical phone, and you''re disappointed because GSM providers here in the US don''t carry the Motorola Razr devices, then this is the perfect workaround solution! I absolutely adore this phone, best choice for me. Thanks for reading, hope this helps a bit.UPDATE: August 18, 2013Still very pleased with this phone! I installed Dropbox the other day, and used it to edit some documents in QuickOffice. Amazing! Just very responsive and fast! I haven''t found a flaw with it yet, and I''ve used it for two months now.