no jtag nor rgh can get online, although if you want a retial/rgh dual nand console it can be done on the retail nand.

In simple terms, Only a couple of people can get jtags/RGH's online at the moment and obviously will not tell anyone how to get them online. RGH's are basicly the same as jtags although you can only jtag a xbox on a certain dashboard (9199 if im correct) or lower. RGH's were the new way to jtag when slim's were released. this is done by a certain chip installation wich can also be done to the fat xbox. You can run xex menu on JTAG's, RGH's + XDK's (xbox development kits).

I suggest checking the marketplace on here. If your from UK i would buy from JTAG-GALORE as i he is probably the cheapest and i bought from him beore and there was no messing around and if your buying from US id say ^^ -Mafia5k- ^^

I Hope i have filled you in enough

jtags and RGH can only get online if you know the method, and even then you need the knowledge and skills to implement it, but like mafia says above if you dual or triple nand you can have a stock/retail nand which can go online but you can only use 1 of the nands at a time

you can run xex menu on RGH...

for trusted sellers here on TTG just look in the marketplace, there's a bunch of stickied trusted sellers there