Tethering doesn't work after android update to 4.0.4

[Nanami]

Hello!

I have LT18i and one week ago i update my android with PC companion to 4.0.4. Now i have big problem because tethering doesn't work (usb and wifi). Also mms don't come. The Internet on my phone work and I can connect my laptop to the phone but don't have internet.

I already try go back to the first settings, but im still in 4.0.4 :<

Someone know why i have this problem after update and how can i fix it? 

Thanks!

[Thommo]

Have you installed the mobile data and MMs settings

[Thommo]

Settings then More then Internet settings then select your provider

[Nanami]

Yes that was the first thing that I do.

This week I make some test and I put my sim card in another phone of sony (with android 4.1), I also try with other laptop and there was the same thing so maybe the problem came from my provider SFR. But its strange before my android update all working well...

Saturday I go to SFR store and I hope it will work out.