MTN Nigeria has change the loading pattern on its recharge cards across Nigeria.
The latest MTN card now has 10 digit recharge PIN and new loading code *3551*10 digit pin#, against *555*PIN#.
The new development, Techplace24.com believes that below issues might be the reason;
1. To reduce Recharge card hacking and other recharge card fraudulent activities.
2. Other telecom provider might be using same loading pattern (i.e, *555*PIN#)
3. A new upgrade or change of system might had warrant the new development.
4. Change of partnership deal with recharge card producers.