Guide
DoCoMo SC-03E Samsung Galaxy S III alpha
How to change/modify Tethering DoCoMo preset APN
DoCoMo SC-03E Samsung Galaxy S III alpha
How to change/modify Tethering DoCoMo preset APN
This work has been edited collecting many info taken from many guides on-line and tested by me.
A well known issue after SIM-Unlocking the SC-03E, is that you cant change the APN on your own providers APN when you want use the Tethering.
Even if you set your providers APN in the APNs settings, when you switch on the Wi-Fi Tethering the APN automatically sets itself on a specified DoCoMo APN (dcmtrg.ne.jp) to check your data traffic by your PC.
So, if you decide to use a no-DoCoMo SIM Card, you cant use your smartphone as modem for your PC.
There are 3 ways to get over this problem, but in all of them you need a rooted ROM (so, be careful at what you are doing).
If you need to keep a DoCoMo ROM, at present the only Rooted DoCoMo ROMs working for this job are the ROMs from aki0306.
You can find them here.
If you dont need a DoCoMo, you can choose a Custom ROM as the CyanogenMod10.1 JP Remix for SC-03E.
Thaks to kizuki.buy and theDroidfanatic for some tips.
Read below for the 3 methods