Habs noch nicht versucht und war noch nie in der Situation aber würde schätzen das du irgendeine ID manipulieren musst, damit die anderen Handys sich als dein Sim Handy ausgeben. Inoffiziell kann glaub ich Xprivacy solche sachen.
Mit nen bisschen Suche hättest du das hier gefunden:
how to bypass "tethering block" Three network | Android Forums
: (Sep 17, 2012 #9)
Von Hey guys, it took me 3 days to figure out how to bypass the three tether block... I tried everything... VPN only tether seemed to have worked but I got banned straight away... Three and any other ISP get only ur user agent info, so if u go to whatsmyuseragent.com u will see what three or any other ISP see, so when u tether iPad or anything else the user agent is seen as iPad or etc... U can use user agent fakers but they still see that you have tethered... The way I found around this is to download a user agent faker on ur iPad or etc ( from Cadia) and then on ur mobile from which ur tethering go to the whatsmyuseragent.com and copy the user agent u see, then on your iPad create a custom user agent (user agent faker allows u to select iPhone user agent mozila, safari and etc but also has a custom setting) in the custom setting paste the copied user agent from iPhone to ur iPad.. And it shud work... Now every time u tether the ISP will see that u have apparently connected using ur standard registered iPhone or etc (but really it's ur iPad).... Essentially this is user agent duplication. Enjoy, hopefully will work for u guys