Asus shipped more than 1.5 million smartphones in May, enabling its handset business to start generating profits, according to a DigiTimes report.
The company expects shipments to reach 2 million devices this month, with sales of its recently announced ZenFone Selfie set to add to the total from July onward.
According to reports earlier this year, Asus saw a slow start to 2015, as buyers held off purchases ahead of its ZenFone 2, announced at CES 2015 in January.
This was then met by a slow ramp in availability for the device.
DigiTimes previously said that Asus is looking to shift 25 million smartphones in 2015, looking to regain momentum in the second half of the year.