Wow… Luckily, Malaysia does not have any carrier branded mobile phone. Else my Samsung Galaxy S II might have carrier branded firmware. No worry for those who has it, XDA Developer, Intratech has a long list of official carrier branded Samsung Galaxy S2 firmware and stock kernel for you. These carrier branded Samsung Galaxy S2 firmware are useful when you want to restore back to them after installed custom firmware.
3G, A1, Bouygues, Cellcom, CLARO, EntelPCS, E-Plus, KPN, Meteor, Mobitel, Movistar, NTT DoCoMo, O2, Omnitel, Optus, Orange, Pelephone, Plus, Safaricom, Simobil, Swisscom, SFR, T-MOBILE, TIMTelefonica, Telefonica, Virgin, VIVO, VIPNet, Vodafone and WIND are the carriers which has carrier branded Samsung Galaxy S2 firmware and can be downloaded at XDA Forum. Follow this guide to upgrade to latest firmware – How to install firmware on Samsung Galaxy S2 with Odin? (Video)
Download official carrier branded Samsung Galaxy S2 firmware and stock kernel here.