Large wiper phone for little money

From the point that the amount can not go wrong, I have "dared" to order this China phone.
My first experiences are very positive, but which I would like to mention that I do not excessively uses the cellphone, ie. Primarily to make phone calls and sporadic Internet research Yes, heck even enter. Apps I have almost no install, no games. For me it was crucial that I can read my ebooks and pdfs halfway tidy on cellphone and works quite well.
Apart from the GPS, which I have not been up and running, the phone seems to work perfectly. I can indeed turn GPS, but there are simply no satellites found, although enough would be available (simultaneous operation of a Garmin GPS device). But since these functions cost ohnhin only battery life, which is no big deal for me.
But there are also some criticisms:
1. The delivery took place in a gray plastic bag, as I'm used to broadcasts from China actually. Only that delivery lt sender from Switzerland came. The plastic bag was also torn up, the phone was packed in a cardboard box, which wrapped in some thin foam.
2. Operation addicts be warned: In addition to a small folded piece of paper there was nothing to find. But nowadays a Adroidhandy regarding the operation was supposed to prepare no great difficulties more.
3. The battery is a bit underpowered compared to my predecessor phone. Although I use not great services, the thing is mostly empty after a day.

Well, now I'm even curious how long the phone will work.