The eternal conundrum of data usage—you buy it on a monthly basis from your carrier and try to use it for any and all needs. If you travel as much as I do, you will know that the luxury of mid to pseudo high speed data on the go on your computer via tethering is a blessing in and of itself. Regardless of how advanced Android is, it still cannot match the utility you can get out of a real computer, whose only on-the-go limitation is the inability to connect to the Web when away from a hotspot. Because of this, WiFi Tether was created way back when.
Limitations in the firmware on most newer devices either disable or create a “wall” to prevent people from tethering (courtesy of the carriers who want to sell such services for a substantial monthly fee). Thankfully, we have very skilled people on XDA, who can get around things like this. One such individual is XDA Recognized Developer TrevE, who you may remember from a little saga he had against HTC and, most notably, CIQ around this time last year. Using the available source for WiFi Tether (which is GPL licensed) as well as some binaries coming from the CM team, TrevE has been able to “force” WiFi Tether to work on the most recent Jelly Bean TouchWiz (stock) ROMs. And as an added bonus, this also works on the HTC EVO 3D when loaded with a Sense 4.x ROM.
Please take it for a spin, and make sure you look at TrevE’s notes in the OP, as the app has the ability to cause some strange behavior if you do not use it correctly. Some of the issues include killing your WiFi altogether, whcih can be fixed with a simple reboot. As always, please leave some feedback for the developer.
Carriers hate tethering, you all know that. Use at your own risk/with common sense & dont blame me for anything that goes wrong
GS3 Specific- Make a system backup, it modifies sys files so theres a chance it will break something
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[Thanks Virus for the tip!]___________________