Taiwan's Foxconn, the world's largest contract electronics maker and the biggest assembler of Apple's iPhone, reiterated on Sunday it expected a rise in second-quarter revenue, and reported record sales for the month of April.

Foxconn said in a statement that this year's second quarter "remains a traditional off-peak season, and major products are entering a period of transition between old and new products".

But it added: "The operations outlook for the second quarter is expected to show both quarter-on-quarter and year-on-year growth".

The statement did not elaborate and the company does not give numerical guidance.

The company, formally called Hon Hai Precision Industry Co Ltd, said April revenue reached T$510.9 billion ($15.83 billion), which it said was the highest figure on record for the same period and represented an on-year rise of 19 percent.

Revenue in its smart consumer electronics products, including smartphones, in April showed "significant growth" year-on-year, it said.

Strong artificial intelligence (AI) server demand also delivered "strong growth" in April on-year for its cloud and networking products segment, the company added.

The monthly sales data comes ahead of Foxconn's first-quarter earnings call on May 14.

Foxconn has previously reported that for the first quarter, revenue slid 9.6 percent year-on-year to T$1.322 trillion, underperforming a T$1.401 trillion LSEG SmartEstimate, which gives greater weight to forecasts from analysts who are more consistently accurate.

The first quarter is traditionally quieter than the previous one, the season when Taiwan's tech companies race to supply smartphones, tablets and other electronics to major vendors such as Apple for Western markets' year-end holiday period.

Apple's quarterly results and forecast beat modest expectations on Thursday, and CEO Tim Cook said revenue growth would return in the current quarter.

In March, Foxconn adopted a far more bullish outlook for this year, saying on its fourth-quarter earnings call that it expected a significant rise in revenue driven by booming demand for AI servers.

Foxconn's shares have surged almost 50 percent so far this year, compared with a 13 percent gain for the broader market.