from pelebkf over at XDA: "Edit the main APN "T-Mobile US LTE" and add ",dun" to the end of the "APN type" (so the it should say "default,mms,supl,hipri,fota,dun") then save it."
Just tried this on my stock, unrooted, XT1053, and it worked like a charm.
Just tried this on my stock, unrooted, XT1053, and it worked like a charm.
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