Quién sabe qué hicieron esos vatos de ATT que no jaló esto... también me pasaron otro APN que quedaría como web.attmex.mx y con ese igual ta jalando. :)
cochinet
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A twitter user pointed that I should change the APN from web.5g.attmex.mx to modem.nexteldata.com.mx. Maybe this got change during the upgrade process. This fix it for me.
Same issue here, did you fix it?