Nexus s ics update wifi problem and android market server error

The Summery is... i gave UP!!!
shit Google!!  from ICS i think he blocked google play, if use it without USIM...
or it can be using 2G Usim... so.. is there any way to us ICS with google play on 2G usim... ????

how ever if you interested how i have it conclusion, plz continue to read.

From last Friday, i tried to update my Nexus S to ICS. I know two months ago from AT&T released ICS update file for Nexus S. But as I bought Nexus S from Korea(also it was secondhand) it was not easy to install it. So i waited until Korean Telecom release Update for ICS... but... last week event though Galaxy S2 started to Upgrade to ICS, There were noting about Nusux S. So I couldn't wait and started to Update My Nexus S after searching how to in google. It was not very hard as i thought before. I followed  http://fosinsight.tistory.com/55 to update.

BUT!!! Because I were in Mongolia, and using 2G usim card.(i think) there were problem... and Google doesn't have the answer about it... 3 Full day i tried every thing. and at last i found how to fix it..
The Problem was if i install ICS with my 2G usim(Telecom was Mobicom(Mongolia)) the Wifi doesn't worked... But if I install ICS without usim, Wifi worked fine.. but when i run my Android Market(it changed to Google Play) it says Server Error. What... the Funktion!!

I tried to install back 2.3.4 then the android Market works fine.

here is how i fix it...
fist from 2.3.4, i upgrade to 2.3.6 with Usim (its important!!)
upgrade file link http://forum.xda-developers.com/showthread.php?t=1445570
choose from the link 2.3.6

then set things and check does market work fine~
don't forget to upgrade your market to google play here~~

if it does, turn off Nesux S and take out Usim!!
then boot it with recovery mode(how to is Volume Up + Power btn) and select recovery
then when the lay down android pic appear again Power btn+Volume Up(remember not using Fast boot).

than... it will work fine~~it is sad that u can't use 2G Usim. i'd never tried it with 3G, but i thing 3G will work fine..

thanks~