This has been working for me for several years on my AT&T Samsung Galaxy S7, however as of a few days ago it doesn't work all the time. I just received 3 updates from AT&T and on update #2 & #3 I no longer have internet access on my phone 100% of the time despite that it says 4G all the time. Consistently saying unknown host. The internet won't work again until I unselect my Access Point Name and then reselect it.... any one have any ideas how to get this working again? Running v6.0.1 Security Patch Level October 1 2016.