I've been using 3650 for over an year and changed to T610 for obvious reason - &quot;right&quot; size. This is my first few daysPros:1. Right Size2. Auto-lock feature3. Ringtone composition - I dont know if I can do this4. Downkey automaticaly brings the entries from address book5. IR, BT &amp; triple-band - all for FREE - Priceless!!! Same with 3650 too...6. Ergonomically - very meticulously - designed7. Intuitive menu8. When you exit WAP browser, the connection to internet is automatically closed.9. Quicker menu response10. WAP browser and navigation is also faster11. Came with a CD to sync with PC. I guess I need to buy the cable.Cons:1. No memory card as in 36502. Poor screen resolution - 3650 is just great3. Poor battery life - it just sucks the power. I've turned off my BT &amp; IR. With 3650, BT was always on and it still did very good.I would recommend this for any free phone shoppers.Mahesh