Quick summary: I have a Samsung Galaxy W sourced from Hong Kong. Specifications on Samsung HK website says it supports WCDMA 850, 900, 1900 and 2100. I'm on Vodafone Australia which uses WCDMA 850 and 2100 in metropolitan areas where I live in. My area has coverage of both frequency bands, but signal of 850MHz is deemed better. The problems is that my phone sticks to 2100MHz on vodafone AU while it can detect Telstra's (another Australian telco) 850MHz signal in manual network searches. Here's the details of my problem that I've already posted on Whirlpool forum (Australia): (3 posts under the same thread) whrl.pl/Rdeiz5 whrl.pl/RdePfz whrl.pl/RdeTy2 What I've discovered so far is that my phone is missing some crucial software configuration for being on 850MHz channels. However, I don't want to root my phone or flash a new ROM as the original Hong Kong ROM is supposed to support 3G 850 MHz. Does anyone of you have a clue?