Mah Boon Krong Shopping Centre (MBK) is one of the the most famous Shopping Centre in Bangkok. Mega City Mall with clothes, watches, phones, food. MBK is linked to the Pathumwan Princess Hotel.
MBK Shopping Center is very famous for its mobile phone shops. It is not recommended to buy a mobile phone here, though. Unfortunately they sell mostly refurbished and fake phones.
It is suggested you find a real retailer from a finer shopping mall, price will be around the same.