I have an S10 Plus on Sprint (USA) network and my phone drops calls, doesn't show LTE, and flashes the "Unable to establish data connection" error randomly. A PRL/Profile refresh fixed the problem temporarily, but then it randomly crashes again.
I took the phone to Sprint where they ran a diagnostic and explained that Samsung released an update that burned out antennas and they ordered me a replacement. I haven't received it yet, but anyone with these issues needs to take their phone to Sprint and have them run the diagnostic. I put up with this issue for awhile since neither Samsung or Sprint publicized it.
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