Pros: speaker phone, MP3 player
Cons: Samsung-only Unique connector
Summary: 1. Got the phone from AT&T. No data cable includes, therefore cannot do many good functions. I blame on AT&T, but Samsung should insist on AT&T to pack it in so that the users can enjoy full usage.
2. (rather stupid) Samsung-only connectors for charging, data, and ear phone. May be Samsung believes single connector for all three (charge, data and ear phone) is a good design, but as a users, I suffer: I have to bring the unique m20-pin charger, whereas adapters with common household connector are readily available. I have to buy and use the (missing) m20-pin USB cable, where the standard USB/A to USB/B cable are readily available. Needly to said that I have to bring the Sumsung m20-pin mic/phone whereas a regular mic/phone is readily available. TO listen to the MP3 music, I have to use that Samsung mic/phone also. Hence, I wonder what this m20 buys the users?
I guess someone in Samsung needs to take a look at the messy design (see http://pinouts.ru/CellularPhones-P-W/all_samsung_pinout.shtml ). If the pinout on this site is correct, just look at how many design in phone with 18-pin connector.
In summary - I would not buy this phone or any Samsung phone again unless it use more common connectors.