সিম কার্ডের রেজিস্ট্রেশন যাচাই - Sim card checker is a very good and handy app that helps to find the number of total sims which are registered by user NID. Just a simple process requires doing this task.This app supports all sim operator in BD like grameenphone, Banglalink, Robi, Airtel, Teletalk. Main Feature of this app: ★ No cost for checking/verifying sim card. ★ Supports all operator in BD like Gp, Banglalink, Robi, Airtel, Teletalk. ★ Verify user NID is original or not through On