I dont have 4G

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2

2018-01-21 22:43

this week I got the phone, I turned everything from the migration tools application and without problems I got 4g and everything.
Update to version 6.1.4.1g and continued with 4g, today I made wipe data because I saw that I had a lot of shit that I didnt want and when everything was set up I didnt take the 4g.all the time it continues with the 3g
Do you know what it can be?
is the m721h version