Hello,
Xperia X Perform is bigger and more powerfull brother of X model - Snapdragon 820, 3GB of RAM and 32GB internal storage and Android 6.0 gives quite boost. Of course now we have more powerfull combinations but it debuted in 1 quartal of this year.
But this is stil model worth it's price but sometimes it have a simlock and you want or must use different carrier - what to do then?
First check counter status and then contact with us via link :
Unlock for Sony Xperia X Perform
Prices start with €5.49 and they depends on your carrier and counter status - with unlocking counter service will be more expensive.

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