Restart bug

I own the Defy + now for almost two years and then have it picked out because it seemed to be a low-priced, modern plus pretty good looking Outdoor smartphone. In the beginning it was also quite good (except for occasional stuttering). Over time, however, the unit depended on increasingly and restarts often described accumulated. For me also the call quality was relatively poor (often occurs on the opposite side to strong halls) and the on / off switch was sometime difficult to handle. So I finally also decided to return the instrument. After less than a week I had a device in which, according to dat repair only the motherboard was replaced, it was obvious, however, is a completely new device. Due to the numerous reviews here and in all possible forums I had hardly given me hope. Lo and behold, I was not disappointed. The new device still led much more by reboots (in 4 hours at least 8; in all situations and without warning) and was not at all to use so. Thank you for this great device, Motorola!