EAD Renewal
Hi Prasad.
I believe in playing safe. Since you are USING your EAD, you should apply before 5 six months to give cushion for a RFE also,
You will be getting one year extension from where you current EAD expires whether you apply now or you apply later. Hope that your employer is paying for renewal, so why delay.
Though applying before 4 months is also safe but INS allows you to apply six months before AP/EAD expiry . If you were using H1 not EAD, i might be suggesting to apply before 3 months of expiry
Thanks
Khi_boy.