Bad sound quality and if you are going to listen music for one or two hours you may have feel irritate because its has bad sound quality.
Not easy to use its does’t have good quality screen touch the most important thing.
Bad look its does’t have stylesh look or cool look like now a days others phone have.
And its not much expensive but better if it is expensive so nobody can buy j2. I was using j2 since 2 months bad phone ever.