I got a notification on my Teracube 2e phone to update from 2e_06 to 2e_16. I authorized the update and it installed w/o a problem. Afterward I noticed that using data only was not working. After checking my APN (which is AT&T), I saw that the APN protocol was changed from IPV4 to IPV4/IPV6. I edited it back to IPV4 and all was working after that.
Googling IPV6, it looks like that applies to T-Mobile phones only.
Also, is there a place where I can find info on this 2e_16 iupdate?