Yep confirmed, did it myself last week for me and a friend
Lol he was making a joke - you don't need Go Binge on the unlimited data plan. Because... you know that you have unlimited anyway? (lol)
OP is expensive route to AYCE everything. Can alternatively achieve £19/m for AYCE everything inc unlim tether, Go Binge, etc on 12m contract via £16/m 30GB plan then in-app priceplan change (not upgrade) to £19/m AYCE everything. Possible additional benefit of cashback when initially ordering the 30GB plan.
"It’s coming home it’s coming home, broadbands leaving home" :D
It was always on there depending on Threes mood lol 4GB/8GB/12GB dependent... Jee wonder what it is now with all the Oct changes (lol) Edit: answer - 10GB on Business, 12GB Personal, 15GB Mobile Broadband