Device is only mittlmäßig.

A product "Hecho en China" with the Banda Role in Spanish and English, that it will only work with SIM cards American provider. Everyone knows this Regionalbeschränkungsbestrebung SAMSUNG. Contact the sender, reply after 24 hours: "It is, ignore Note."
Activation: load off for 12 hours. Activation without SIM, initial settings, eg "German". Off. A SIM enlegen, new turn. It goes immediately. Then the same thing with the second SIM.
I do not find that the device is slow, it is faster than a S3. Switching on and off depending on a SIM card works like the entire operation with two SIM perfectly. You can assign characteristics of each SIM easily, for example, if the number is transmitted or not. The Internet is fast, but I'm not a player, the game function, I can not evaluate. Seeking addresses, etc. way. And that is properly fast.
The case is the S4 very similar, very nice and small.
But the problem is the battery. If the device is switched on without phoning and one has both turned on SIM must for about 36 hours on the charger. If you switch from a SIM, it is sufficient for 48 hours without a phone call, etc. The disconnection of a SIM increases battery time deutlch.
For normal use, often in shielded areas, building or car, even on the phone, Internet time, sometimes SMS - holding the device with two SIM cards safely switched over one day. But I'm also not the Moonlight Sonatas Telefonierer, I estimated 15-20 phone calls to 3 minutes.
If you can live with it, to put the machine every night to the charging cable has my a very nice little device with fast function. There has always persevered in my day. It is simply a trade-off, small-since a large battery goes in.
My full recommendation for the Schck small device that you should invite every night.