New details have emerged about Sajid and Naveed Akram's month-long trip to the Philippines weeks before the Bondi Beach terrorist attack.

Naveed Akram, 24, travelled to the archipelago nation in November with his father Sajid, 50, one month before they allegedly opened fire at a Hanukkah by the Sea event at Bondi Beach, killing 15 and injuring dozens more.

While it has been reported that the Akrams stayed at the budget GV Hotel in Davao City on the Mindanao island for their 27-day stay, it was previously thought they barely left their tiny, cramped $24-a-night room.

It has since emerged that the alleged gunmen visited a popular beach resort and a nearby gun shop, along with an Islamic prayer house near Davao City in the nation's south, the Sydney Morning Herald reported.

A ping from one of their mobiles suggests they could have journeyed even further afield, to the village of Dungoan, which has a history of Islamic state extremism.

According to sightings of the pair, Naveed took a morning dip at the picturesque Seagull White Sand Beach Resort, known for its clear blue waters and party reputation.

His father Sajid inspected bullet-proof vests at a small weapons retailer, Shooters Guns & Ammo Corporation, located 150m away, where he refused to acknowledge a female staffer's offer of assistance.   

The Seagull White Sand Beach Resort lies 7km from the GV Hotel and as its name suggests, is located on white sands fringed with palm trees.

The father, Sajid, browsed bulletproof vests and gun posters at the Shooters Guns & Ammo Corporation at Davao City (above), a branch of the largest retail arms company in the Philippines

Naveed and his father Sajid (white trousers) on the early evening of December 14, two weeks after returning from their trip to the southern Philippines

The resort is a mecca for holidaymakers interested in water sports such as snorkelling, scuba diving and jet skiing.

Witnesses told the Sydney Morning Herald that either Naveed, or both Akrams took a swim around 10am one morning after being dropped off by a taxi.

'I was told they went for a swim in the morning, about 10am,' a lifeguard recalled.

A security guard at the venue recalled only seeing a hot and sweaty Naveed being dropped off by a taxi.

The Shooters Guns & Ammo Corporation in Davao City is a branch of the largest retail arms company in the Philippines.

A staff member recalled seeing Sajid in the weapons store studying gun posters on the wall and cabinets full of protective gear, including bulletproof vests.

The visit stuck with her because he refused to acknowledge her when she asked if he needed assistance.