Seriously I dont wanna say this, but I have to do it right now, when I purchased my first phone of my life it was samsung, it got hang, hang and hang.
I baught the other one called samsung galaxy y, it worked good for one and half year, but after that.
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There were many problem with that brand like bad battery backup, it got hang quite in many occasions, but it had a very good camera quality.
But in the end you cannot buy a cellphone for just its camera quality you have to look other key features also.like memory, RAM, operating system and many more.
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J2 has to work on RAM, raise camera pixels.nothing more