Play store search upay. Dawnload link:https://play.google.com/store/apps/details?id=bd.com.ucb.upay
My reffer number:01798908505
Singup system,
1/email address
2/nid card full name
3/nid card number
4/nid card birthday
5/referral bonus number:01798908505
Singup
USB code number verify
And password system
Then login number and password 2/3 verify account admin and bonus ৳৫০ complete payment received number or ATM withdrawal.