Super slow data on Umidigi Z2 phone


    Hi there.  I just got Umidigi Z2 phone as an experiment.  It connects to the LTE network without any problems.  It makes phone calls without any problems.  Without WiFi, I get a good speed (55x5) on the Speedtest.  But when it comes to actually downloading things, it is super slow.  Youtube loads forever, Google Play takes forever to download anything, etc.  I know it's most likely the settings but just can't figure what to change.  When running the Speedtest, it somehow shows the server being AT&T and then T-Mobile.  Any suggestions? 

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