Help WiFi not working after flashing stock rom

[Ejuju]

Ok so i just restored a Samsung Galaxy S3 using this guide:http://forum.xda-developers.com/showthread.php?t=2187081.
Everything is fine only problem is that now I can't connect to wireless networks. I tried updating with Kies but it says that my firmware is not supported. I need to fix this...

 

[funkylogik]

Bro what model/carrier version of the s3 was it? That guide is for the international
If it is the international, it needs APN settings to use mobile data

 

[Ejuju]

Bro what model/carrier version of the s3 was it? That guide is for the international
If it is the international, it needs APN settings to use mobile data

The carrier is Claro, I bought the phone in Honduras. The version is i9300 i think.