I recently received a "new"phone replacement which was actually a referb so I assumed that was the problem but after reading all the posts see its not only me. I have a galaxy s6 and continuously the signal cannot be found in have the latest update I always update and still having same problems
If you have Android 5.1.1, you may be experiencing some issues. The good news is we've already started rolling out a fix. You'll receive a notification (if you haven't already) to install the update, but feel free to check for it manually. Here's how:
Settings- About device - Software Updates and select Update now.
Hope this helps!