A few weak points - otherwise ok

Now use this smartphone intensively for 4 months. Was already on the positive points some written. All in all, this is actually a very cool part. Unfortunately, there was at me lately a few issues with the software. The display freezes regularly, which requires in most cases that you have to remove the battery, then make clean again, and only then it can be put into operation again. What has also happened already often and the last few days has accumulated, are terminations of my calls I want to make. I need to try more often that I get a telephone call it is quite times. Have now returned in the hope there is something you can fix. Maybe I only get a Monday phone. Because of these software problems I give only 3 Stars. Otherwise, I was actually very happy with it initially.