No signal after Marshmallow update? Tmobile htc one m9

A

AC Question

I recently downloaded the Android 6.0 on my Htc One M9 and can no longer make any calls or connect to my mobile data. I am currently roaming in Mexico and I don't know if that has anything to do with it. I have tried connecting to networks, changing to CDMA/GMS and cannot connect to anything. I have Tmobile and had been able to get LTE down here and everything and now I can't. Any suggestions? Thanks.
 

Deuel8677

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Mar 12, 2015
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ok so I finally got the signal working on my note 4 with the marshmallow update open the dialer and key in ##72786#. worked for me itll restart then signal should work not sure if this applies to anything other than the Note 4 but its worth a try