Very happy with this phone. I was using an unlocked 6102i prior to this one and it was an excellent phone as well. The 6131 makes great calls and I am with Cingular.Beautiful internal screen, big buttons and neat rubbery finish on the outside. Unique design, press a button and the phone opens up. I really think this feature is cool.The 1.3 mp camera with 8x zoom takes excellent pictures, especially when your are used to using a VGA with no zoom. The micro sd card, another excellent addition. I was used to taking 5 or 6 pics only to run out of memory and have to start deleting pics. I bought a 1 gig card and have no more memory problems.Great FM radio along with mp3 player. I already had the Nokia stereo headset needed for the FM radio for my 6102i and it works perfectly on the 6131. I transferred about 150 mbs of music via bluetooth to the phone from my PC. Works great. I can listen over the speaker or listen by bluetooth or headset. Speaking of bluetooth, this phone has no problem pairing up with bluetooth devices. Speakerphone is great for phone calls as well when not using bluetooth.Edge technology is plenty fast for internet browsing. As with any unlocked phone you will spend a few hours the first day getting downloads from Nokia, googling, tweaking settings, etc. to get the internet, MMS, text messaging, email, etc. to working. But is it easy and once done, it's done.Now the only bad thing is, yep, battery life, it is bad. Consider yourself lucky to go a whole day without charging. It really depends on how much you surf the internet keeping that beautiful power robbing internal screen lit up. Luckily the 6131 uses the same battery as the 6102i so I have a total of 3 batteries that I keep charged and just switch when needed.All in all, the best Nokia I have owned to date. Every Nokia I buy is better than the last. You won't regret buying this phone. Just grab an extra battery on ebay. You will be all set.