Sony Mobile has gain tremendous amount of popularity when the flagship Z series is even released. While Sony has been focusing on smartphone production and manufacturing in China due to its low labour cost and high efficiency process, it will be moving its production hub into Thailand in the future.
This action from Sony was first noticed when they starting to invest into factories inside Thailand. With every smartphone now produced from Thailand, we could expect their smartphone will be stricter quality control process for the making of a high quality durable smartphone.
Source: Mobile Magazine