Neither a smartphone, nor a basic phone but a real physical keyboard

This mobile will not rival the latest smartphones. The number of interesting applications available in the Store is revealing.
By cons, it's a very basic phone evolved with very interesting features for me. For example I like being able to use a security code is requested before unlocking the screen. Very convenient for secure access to my mobile.
Autonomy is also very interesting for those who do not use or very little data connection or wifi. Because the data connection is slow because it is 2G (GPRS / EDGE).

Selection criteria: product designed carefully, very nice physical keyboard, more than acceptable autonomy