As a pure communication device, the Nokia 6820 was the best I ever had.
Obviously the flip out full keyboard was amazing. The best feature. But also it was a standard ‘brick’ Nokia phone, meaning battery life was incredible, and still it folded up very small for pocket carrying. Also the directional stick was very tight and had no play. You could flip open the phone with one hand, and then hold it all in one hand and type one handed if you wanted to. It was perfect. Moar pics! (Not my hand)
All of the WML apps I made from the pre-smartphone era were tested and designed for this device.
Actually this form factor really is perfect. If someone made this today, and it was 4G and was simple to tether to, that would be incredible.