The P910i is a great overall phone. This was my 3rd Symbian smartphone the first two being Nokia Communicator 9210 and then the 9500. Honestly speaking the cost and value proposition for this phone is the best among all the other smartphones available in the market.
Rock Solid Stability and a fantastic Bluetooth stack are just few of the things in this well rounded and extremely user friendly phone. I experienced only one Adobe Acrobat reader crash in over an year of use and that too when I tried to open a 3 MB PDF on the phone.... It opened nevertheless but then the Acrobat Reader crashed when I started scrolling.
The form factor is equally good and the phone is very comfortable to hold even during long conversations. The only thing pathetic about this wonder is the feeble speakerphone and the hopeless camera. The Nokia 9500 also has a similar VGA camera but the pictures taken by my Nokia 9500 were far more sharper then the P910i.
Build quality of the P910i is the best again and it feels very well put together and the flap is fantastic. I used this phone for almost an year and there were no indications of any sort of wear on the phone or the flap hinges.
Apart from the Touchscreen which gets scratched over a period of time and then becomes very irritating to use the phone is an excellent allrounder. Do install the Opera Mini browser if you really want to enjoy the web on this phone.
At around 22K in the market with all necessary accessories and bill it is the best smartphone you could buy today.
Pros:
Very Stable OS and Applications Stack.
Lot of third party applications available for free.
Themes and Ringtones available for free from Sony Ericssons site.
Reasonable Battery Life, lasts two to three days with average use.
Ability to update firmware yourself. No Need to give the phone to the service centre.
Cons.
Touchscreen is great but tends to get scratched after heavy use.
No WiFi.
Camera is hopeless.
Average Speakerphone quality.