MTN Irancell has appointed Dr Bijan Abbasi Arand as CEO, while Oyebowale Akideinde joins MTN-owned Simfy Africa.
The SA telco denies it ever paid former ambassador Yusuf Saloojee any money to help it gain its Iranian licence.
MTN South Africa made more average revenue per user in the quarter ended 30 September, despite losing 705 000 customers.
The company reports revenue growth, driven by voice and the expansion of data and digital services.
US sanctions against Iran may curb MTN's ability to repatriate R3 billion from its operations in the Middle Eastern nation.
Group data revenue spiked over 29% year-on-year in the first quarter of 2017, pushing the telco's overall Q1 revenue up 7%.
Car-hailing platform Snapp's mother company, Iran Internet Group, secures fresh funding from MTN Irancell.
The mobile operator is in talks to repatriate money from the sanctioned Middle East country.
The operator managed to source sophisticated US computer equipment despite sanctions that prohibit sales of American technology to Iran.