It sounds stupid but it is true!

two identical phone's are needed, two same network sims and a recharge card of any amount.

Type your recharge card pin in both phones, when want to send, send both phones at the same time. The card will enter the two phones.

The secret is the two phones you used to load that one credit is the same phone, the same server, the same network signal, the same running roaming and same version no difference between them.

Test and post comment.