Did you actually buy this "China Mobile A1" in China, or was it an import from China or something? Do you know who the manufacturer is?
I've not seen it for a while, but there have been reports of Chinese devices that include govt censoring baked into their firmware, which can't access Google etc, no matter where they are in the world. Last report I seen was a tablet bought in Shanghai, that couldn't access Facebook and Google in the UK, because the hosts file had been fixed.