[feedquote='Gsm Arena Feeds','http://www.gsmarena.com/sony_xperia_z1s_comes_with_bootlader_unlocking_disabled-news-7597.php']

At CES, Sony announced a special version of the international Xperia Z1, called the Xperia Z1S for T-Mobile in US. While on surface, the two phones seem nearly identical, except for minor differences such as 32GB of storage space instead of 16GB, turns out there is one more important change under the hood that you won't see on a spec sheet. According to various sources, the Xperia Z1S...

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