well i dont want to offend no one but the phone is a 4.1.2 android version .. (which is around 5 years or more behind with the requirements of today) ul have issues as performance... id suggest trying to upgrade to a 4.4 + atleast. Hereis a random phone that is pretty good... i got one also and its working flawlessly on pretty much any game ... if u going into game development you will want low spec phones and above medium ones... u cant develop games working only on the low spec... one issue wold be ur game wont run as smooth on others ... since u will optimize them for the 4.1.X ... which lacks multiple performance supports...
in Two/Three words for the question you asked about the phone u presented ....OUT-DATED GARBAGE
you can find better deals for the Xperia this days thats just some random find on amazon... where prices going crazy amounts for no reason... thats the retail store price actually when it appeared 2 years ago i think... u can find them used for 100 bucks now