I connected my Bluetooth headphone to the Galaxy A51 for the first time, after I playing music, the sound keeps breaking every few seconds, and after 2 minutes, it automatically disconnected. Besides, When music still playing and I try to open other applications phone slows down and again sounds streams with the stuttering.
some times screen, stop working and touch not working correctly.
Also, I have other problems. I can't use L2TP VPN connections because when connected to the VPN after 60 seconds phone crashed and restarted.
I tell this problem to the customer service, and they told me it is a common problem, and you must wait for the Samsung release update to fix this problem.
I regret buying this phone.
Update - February 12, 2020:
Eventually, after two weeks, Samsung Customer Service replaced my Phone with a new one.i would like to Describe my Experience with the new Phone.
Now I have New Galaxy A51; my Phone has Android 10Q with Build Number A515FXXU1ASKJ. My previous GALAXY A51 had updated to A515FXXU1ASL6 that had a lot of problems with Bluetooth and WiFi.Because of my experience, I stopped updating the software on the new Phone. The Phone works perfectly without any problem. Bluetooth works without stuttering and keeps connection always.WiFi works perfectly, and the Phone never freezes or lagging. But my memory usage is unusual; in the last 24 hours, my average usage of memory is 3.5GB (60% of 5.8 GB available memory).
I think GALAXY A51 problems occur in new Build Numbers (A515FXXU1ASL6 / A515FXXU1ATA4). Thus, please do not update your Phone until Samsung solves problems in new versions. Please, anybody, have Bluetooth issues; please write your 'Build Number' in comments.
For finding your 'Build Number', you should go to the address below:
Setting > About Phone > Software Information > Build Number