Indonesia’s second-largest mobile operator Indosat plans to shut down its CDMA network after migrating the remaining subscribers off the service by the end of June to comply with a government order.

An estimated 77,000 CDMA customers in 83 cities are on its StarOne service and will be shifted to its GSM network, the Jakarta Globe reported.

The operator, which has about 66 million mobile connections, was ordered by the Communications and Information Technology Ministry to move CDMA customers off the network to free up the spectrum band.

Existing StarOne users will receive a GSM SIM card and any credit can be returned in the form of electronic money through Indosat’s e-wallet service Dompetku and can be used to buy phone credits or pay for public transport, the Globe said.

StarOne users will also be able to forward calls and messages temporarily to their new GSM numbers.

Meanwhile, state-owned Telkomsel, the country’s largest telecoms operator, will shut down its CDMA subsidiary, Flexi, by the end of the year.