The Sonim XP5300 is already a hammer part, the battery simply outstanding (as see all smartphones from old), the processing absolutely great and it even takes 64 GB Micro SD cards an.Der speaker is also great (almost like a mini radio) and it are also no problems with huge MP3 collections with me almost 55 GB.Ansonsten I use as Navisoftware Navigate by Telekom (GPS reception in what felt like 5 seconds) and in general there are good apps for the Teil.Ich'm Java Apps Opera Mini 7.0, Facebook, Google Maps, MGMaps, Weather Forecast, First Aid 3.0, S-Banking, Currex Currency Converter, Skype and a few more games (Block Breaker, Brothers in Arms, Call of Duty Black Ops, Extra Spatials 3D, God of War, Gunbird , Ludo, Turrican) to pass the time on it. Ebooks are displayed in TXT format but with Callibre you can (not copy-protected as long) converted to TXT format so that they run perfectly on the XP5300 also at Amazon Kindl selling eBooks. Videos also be played perfectly in the MP4 format from the Iphone, I did not have to again convert the format of the radio is also top-notch reception. Bin completely thrilled and to try all the smartphones on the market that is now my cell phone for the next few years.