Robustness: The unit is fairly robust. I really do not go carefully with cell phones to my last (Nokia 6300) is even several times broke me, the 3720 still looks despite small falls from almost like new, not even annoying scratches. Crashes or malfunctions so far not yet arrived and I have the device in continuous operation. I'll go but let's assume that it is in larger crash over, because you have probably the brand grab "Sonim".
Keyboard: Here I have to make small concessions. The pressure point is ok, could be a bit tougher, but there's worse. In fact, however, hash and asterisk key are not made for my fingers, it happens to me from time to time still, I need 3 attempts to key lock goes in.
Display: The display is a mobile phone in this price range absolutely fine, size and resolution are standard.
Camera: Photos and videos can be forgotten. For a snapshot, it is sufficient, but a replacement for a digital camera, it is definitely not! After a flash is, but greatly distorted the colors depending on the light situation. I use the camera only to scan timetables or things that I want to remember me.
Extras: With this maps but no GPS receiver and navigation software. But can not ask in this price range. UMTS and WLAN are also not included. As an interface Bluetooth is offered. Very practical is the flashlight! Had previously not thought that I would take the times as likely. An extremely useful tool!
Battery: The term is actually quite high, if you do not use the phone, the battery lasts for almost a week. When a lot of phone calls or plays, it comes but then faster (2 - 3 days) but is still above average.
Games: There are a few nice games pre-installed, otherwise many demos. That may be different if you buy from a different supplier.
Internet: never tested, but I think it was needed rather something like an iPhone, so it's really fun.
Office / Organizer: Even for the phone is not necessarily done, but has everything one knows from other standard Nokia models. Can be synchronized with Outlook.
Conclusion: For my purposes perfectly adequate, the lack of amenities I can do without, and that you can ask for this price either. Who needs a solid, robust phone for basic functions with a long battery life, is absolutely right with the device! And for an outdoor phone looks quite stylish's even out.