Samsung galaxy A7 2015 is the most out dated phone. In range you can get other phone with lots of new features even you can of Samsung's phones only at cheap rate with more features.
Some of the limitation of this phone is: -
2600 Mah battery. This phones has a very low capacity battery which is 2600 Mah and it requires to be recharged within few 4 to 5 hours only even less than that of used in 4g connection.
Low internal storage. This phone comes with 16 gb internal memory which really very low. More than 4 gb is already occupied with its systems software.
No finger print security system. After paying around 20000 you even not get a finger print sensor in it which is even available in 10000 phones also.
If you are planning to buy this phone I will prefer you to not to buy this rather than go for A7 2016 or any other
