Absolute bad buy - no telephoning possible

First, has the wiko smartphone very well acted (speed, Internet speed, style, etc), after about 3 weeks, however, the first problems arose out: The basic function of all cell phone, the phone suddenly stopped working. De connection was not as isolated, but hear me or I heard the interlocutor simply no longer, so after about 30-90 seconds of each call. I've been waiting a couple of times (my interlocutor also), then after about 2 minutes returned the call, that we heard again. If I, however, tried to launch to start the conversation again, it took up to a minute until the phone finally responded to the command! partly were finally active calls simply no longer possible - no connection can be produced. With the Sim in other phones there were no problems, that it had to be on the phone. Wiko has the Grotto absolutely worst service I have ever seen, after almost 2 weeks of waiting time came back an automatic response that it would currently take a while before complaints are processed ... therefore asked on Amazon to return. That worked great - thank you Amazon! And now, after about 4 weeks with the new unit will be exactly the same again !!! Absolutely unacceptable, to lead a discussion not only in private but also in particular in the professional field, which does not break off after a maximum of 1.5 minutes or to need 10 attempts for every normal conversation!
Next time I spare me the trouble and put some extra money down and then not get such a waste ...
PS: As someone wrote: The GPS does not work really, the phone switches itself again and again simply from (so I could just live better than it, not being able to make calls)