Its very strange to know that idea dont provide 4g services in delhi ncr. Delhi is metro politan city, after that this is real situation.Due to unlimited call offer with 1gb 4g data daily, ill think to port in idea, but when I its ported than idea says that in delhi ncr dont have 4g sevices.Now ill bound for next three month, ill port again in vodafone or airtel. Because it is very good service in all over india.Ill personally sugest pls dont go with idea, may be you will not able to get in 4g services in other state too.Ill suggest idea cellular to pls talk to authorised person or department for get start 4g sevices in delhi ncr.