Time: Local time is GMT +8.
Electricity: Electrical current is 220 volts, 60Hz. Two-pin flat blade attachments and two-pin round plugs are used.
Money: The currency of the Philippines is the Peso (PHP), which is divided into 100 centavos. Major credit cards are widely accepted in the cities and tourist destinations. Banks do not always accept travellers cheques, but a receipt of purchase is useful. ATMs are available in the major cities. US dollars are widely accepted in Manila and other tourist areas and are the easiest currency to exchange; otherwise Euros and Pounds Sterling can also be exchanged in banks and hotels. Banks open from 9am to 3pm, Monday to Friday, but their ATMs are open 24 hours. It is best to carry pesos when travelling outside of major centres.
Tipping: Tipping is expected for most services in the Philippines. The standard practice is 10% of the total bill. Tipping is optional on bills that already include a 10% service charge.
Safety Information: Safety and security should be of paramount concern to any visitor to the Philippines. It is vital to be fully informed of threats and developments regarding crime, terrorism and kidnapping before and during a visit to the islands. Vigilance is vital throughout the islands, particularly in Manila, as opportunistic crimes are motivated by circumstances of poverty. Extremist groups have a history of kidnapping foreign tourists, and terrorist bombings have occurred in Manila and Mindanao, targeting transport and public places. Recent explosions in Mindanao have killed and injured many people. Security has been increased across southern Philippines, and many foreign governments have issued warnings against travelling to Mindanao. Terrorist groups have also threatened to attack passenger ferries and other vessels, particularly those operating from Mindanao. The threat of terrorism and kidnapping is greatest in central, southern and western Mindanao, Basilan, Tawi Tawi, Jolo and the Sulu archipelago; the FCO, US Department of State and other governments advise against all travel to these areas, and care should also be taken in Palawan and at coastal resorts and tourist centres throughout. There is a high incidence of piracy and armed robbery against ships in and around Philippine waters, and a risk of kidnappings at sea. It is believed that terrorists are continuing with plans to kidnap foreigners from the islands and coastal areas in southern Philippines, putting all boats travelling to and from offshore islands in the Mindanao and the Sulu archipelago, as well as at dive sites at great risk. Safety standards on ferries are low, and rescue services are not very comprehensive. It is advisable to avoid travel off the beaten track, and to leave travel plans with friends, colleagues or relatives. The area is prone to typhoons between July and November, when flooding and landslides can occur; Typhoon Fengshen in June 2008 caused flash floods, landslides and rough seas that has lead to hundreds of deaths.
Local Customs: The concept of ‘shame’ is very important in Filipino culture and visitors should avoid offending or embarrassing anyone in public while visiting the Philippines. Failure to live up to accepted standards of behaviour brings shame not only on themselves, but also on their family. Any food or drink offered should be accepted, as this is a sign of hospitality.
Business: Third party introductions are useful when conducting business in the Philippines and face-to-face communication is key. Emphasis is placed on building good working relations and getting to know each other. Business is conducted formally, and although punctuality is important, meetings may not begin on time. Dress should be conservative; suits and ties are the norm, although many Filipino men wear a shirt known as a barong tagalong, which is a far cooler option in the humid environment. English is widely spoken in business circles and business hours are usually from 8am to 5pm Monday to Friday.
Communications: The international access code for the Philippines is +63. The outgoing code is 00 followed by the relevant country code (e.g. 001 for the United States). City/area codes are in use, e.g. (0)2 for Manila. The major towns, cities and popular tourist spots are covered by GSM 900 and 1800 mobile phone networks. Internet cafes are available in Manila and the tourist resorts.
Duty free: Travellers to the Philippines over 18 years do not have to pay duty on 400 cigarettes or 50 cigars or 250g pipe tobacco; and 2 litres of alcoholic beverages. Prohibited items include firearms or parts thereof, explosives and ammunition; printed material that contains subversive, obscene or pornographic content; drugs, gambling machines, lottery sweepstake tickets, or coin-operated video machines; gold, silver and other precious metals that do not have authentication of quality; non-identifiable brands of medicines or foodstuffs; coca leaves and any prohibited drugs; plants or parts thereof, fruits and vegetables.
Source : http://www.wordtravels.com/Cities/Philippines/Manila/Basics