Turbo speed technology a new feature which comes with the phone acts as a performance entancement . it is achieved by using the least amount of resources to complete a particular task in the fastest time .apps will load up to 40 parsent faster when compard to device which has ram of more than 2 gb in samsung galaxy j2 improved 2600 mha battery tha last year 2000 mah is enough to last throughout the day for normal users . and I think lots of disadvantages of samsung galaxy j2 . the first is with the chipset which is a 1.5 ghz quad core from spreadtrum . why they are making fools to the consumers with a mere quad core . 2. another galaxy j2 2016 disadvantages is that the phone duos not come with fast charging technology .the absence of quick charge is a huge disappointment