Originally Posted by
Joshu42 No need to go further : you have obviously a signal strength problem. If you didn't see this issue with other devices, your phone has a big problem. At this rate, it sounds more hardware than software. Did you drop your phone recently or open it to change something ?
I can only advice you to use the warranty. Now, you can take a step further and try a 10.2.1 autoloader, check the logs again, only for the dBm values. If the same, you'll know for sure it's a hardware issue. If not, an autoloader to the last release may be able to correct a corrupted radio... (I really think it's hardware though)