The nearly 4-inch display dissolves with 480 x 800 pixels and tends to sunlight for mirroring. Since you can use two SIM cards at the same time, (Bergtour construction site) it is also in outdoor use even for the boss yet easily accessible. Emails however it only receives about HSPA, LTE does not support the Thunder unfortunately.
Data are then evenly shared via Bluetooth or microUSB. Music, pictures, videos, you can outsource the internal memory (about 2.3 GB) or more on a microSD (up to 64GB).
In the test I did it several times from 70 - 150 centimeters dropped and can make no further damage in addition to minor scratches. Robust, it is so. Unfortunately, the edge around the display (rubber) is not very high, a direct hit, I would but then do not want him at this point expect.
The Thunder is protected to IP68 against dust and immersion in water. This worked well in the test, even better than my Xperia Z3. In contrast to the Sony I can operate the display of Thunder even with wet handers yet.
For almost 160 euros gets as an outdoor-compatible smartphone with slight weaknesses. The price will certainly continue to fall (see IceFox X2).