@Stefano I don't see this problem on my device , I will consider that as a test item

@speedracer08861 AFAIK the processors are the same , samsung 8 core,
I am agree with you that radio and modern thing itself is problematic .
I checked this post
https://forums.ubports.com/topic/929/update-meizu-pro-5-baseband

some people are ok with td-lte version , maybe it is vary and depends on the country and carrier.