SIM Technology Group (HKG:2000) recorded a total revenue of HK$25.8 million in April, down 39% from HK$42 million in March, a Friday Hong Kong bourse filing said.

The mobile communications company's revenue from the core business fell 36% to HK$22.2 million in April from HK$34.5 million a year prior.

For the four months ended April 30, total revenue rose 32% to HK$140.6 million from HK$106.6 million in the year.

The changes in revenue were attributed to adjustments by customers in the delivery time of their purchase orders.