How to charge the iPhone 4S when staying in Guam

Using a USB 30-pin cable with a 2 pinned Type A USB adapter to recharge your iPhone 4S from a Guamanian power outlet and powering the iPhone 4S using a 3 pinned Type B USB adapter.

Guamanian power outlet

Varying complicated combinations of region codes and plugs can often be confusing when planning to travel to a different country especially to the first time traveller. These instructions were written to prevent you worrying if you'll be able to charge the iPhone 4S when going abroad.The following step by step instructions tells you what you'll need to supply power to your iPhone 4S when you're visiting Guam by using the standard types B or A Guamanian 110 volt 60Hz wall outlets. Power sources will change from country to country therefore please read the WikiConnections global power connections list where you'll find a complete list of powering devices in different destinations. If your iPhone 4S charges slowly or does not power up when travelling to Guam from another country then check that it is compatible with a 110 volt power supply. Typically devices which originated from a country which use a higher voltage such as 240 volts either take longer to charge or won't power up, check your device is dual-voltage (indicated by 100-240 volts) else you may need to use an additional transformer to ensure proper use. These instructions assume that you have installed Apple iOS 7 or greater on the iPhone 4S.

Charging the iPhone 4S in Guam

Can the iPhone 4S be used in Guam?

Yes, you can use the iPhone 4S in Guam.

What is the best travel adapter for recharging the iPhone 4S in Guam?

When you are travelling to more than one country the best travel charger for Guam is a multiple USB adapter which includes compatible plugs such as a 4 port USB travel charger [8]. There are two different standards of power outlets in Guam (types B and A) and using a power adapter like this ensures that you are covered for type A. Because these chargers are supplied with interchangeable pins and handle 100 - 240 volts it makes them ideal for multiple countries in Europe, Asia, North America and Africa just by changing the supplied heads over. If your model of iPhone 4S can support Fast Charge then you'll benefit from quicker charging times with one of these power chargers plus support for certain power hungry devices like tablets.

Unlike other travel adapters this will also allow you to charge multiple devices at once without needing to pack seperate power chargers or using up additional wall sockets. Only needing to pack a single international USB travel charger will also keep the overall size and weight down, making it ideal to fold up in hand luggage. Due to their flexibility these types of travel chargers can be used back at home as well as abroad so when you're not travelling they can sit under your bedside table charging multiple smartphones, tablets and e-readers with only a single plug socket.

We suggest buying this type of flexible travel adapter online, the multipurpose travel adapter illustrated here is the 4 Port USB Wall Charger [8] which has been successfully tested with multiple USB devices in numerous countries.

Alternative travel adapter for Guam

The 4 port USB travel charger [8] is the most compact option for travellers from around the world wanting to charge devices via USB, however for those also wishing to use their domestic plugs the following power adapters provide larger but more versatile solutions. All 3 power adapters offer surge protection which can be necessary when visiting counties with unreliable power supplies. These travel converters come with interchangeable type C, I and G plugs covering both Guam and over 150 countries around the world:

  • BESTEK Portable International Travel Voltage Converter - The BESTEK travel adaptor has 4 USB charging ports with 3 AC power outlets and is the most popular compact option for travellers originating from North America going to Guam using 3 pinned type B US plug sockets.
  • ORICO Traveling Outlet Surge Protector Power Strip - Similarly having 4 USB ports but only 2 AC power outlets the Orico travel adapter is also aimed at travellers originating from the US using type B plugs and is a more cost effective alternative to the BESTEK with one less AC outlet for almost half price.
  • BESTEK International USB Travel Power Strip - This power strip has just 2 AC outlets but offers a more generous 5 USB charging ports. This versatile power strip is compatible with both American plugs and popular plug types A, D,E/F, G, H, I, L and N making it suitable for a wide range of travellers from around the world visiting Guam.
What is the best travel adapter for recharging the iPhone 4S in Guam?

Charging the iPhone 4S from a Guamanian power outlet by using a two pinned Type A USB adapter

Using a USB 30-pin cable with a 2 pinned Type A USB adapter to recharge your iPhone 4S from a Guamanian power outlet.

  1. If you want to charge the iPhone 4S from the Guamanian power outlet you'll need to use a Type A USB power adapter [4] and a USB to Apple 30 pin cable [5] - Apple should usually supply this USB cable with your iPhone 4S.
  2. Begin by inserting the Type A USB power adapter in the power supply. This unearthed wall supply (called a Type A power outlet [3]) can be identified by the two thin adjacent slots.
  3. Plug in one end of the power cord into the bottom of the mains USB adapter and the other end into the dock connector on the iPhone 4S. The iPhone 4S dock connector can be found at bottom of the iPhone 4S.
  4. Turn on the Guamanian power outlet.
  5. The battery icon which you'll find in the top right corner of your mobile screen will display a charging icon to indicate that the iPhone is recharging and takes between 60-240 minutes to recharge.
Charging the iPhone 4S from a Guamanian power outlet by using a two pinned Type A USB adapter

Powering the iPhone 4S with a Guamanian power outlet by using a 3 pinned Type B USB adapter

Using a USB 30 pin Apple connector and a Type B power charger to power your iPhone 4S from a Guamanian power outlet.

  1. In order to charge the iPhone 4S from the Guamanian power outlet you'll need to use a Type B USB power adapter [7] and a USB to Apple 30 pin cable [5], Apple will typically include the USB cable with your iPhone 4S.
  2. Plug in the Type B USB power adapter into the wall outlet. This wall supply (called a Type B power outlet [6]) is recognised by the two thin slots with a hole below for the slightly longer earthed pin.
  3. Then connect one end of the USB to Apple 30 pin cable into the bottom of the USB mains charger and the other end into the dock connector on the iPhone 4S. The iPhone 4S dock connector can be found at bottom of the iPhone 4S.
  4. Switch on the Guamanian power outlet.
  5. The battery icon that appears in the top right hand corner of the iPhone 4S will display a charging icon to indicate that the iPhone 4S is charging which typically takes roughly 1 - 4 hours to fully recharge to 100% capacity.
Powering the iPhone 4S with a Guamanian power outlet by using a 3 pinned Type B USB adapter

See also

  1. https://en.wikipedia.org/wiki/Guam - Guamanian Wiki page
  2. https://manuals.info.apple.com/MANUALS/1000/MA1565/en_US/iphone_user_guide.pdf - Official iPhone user guide
  3. http://www.iec.ch/worldplugs/typeA.htm - Type A power outlet
  4. Type A USB power adapter - Provides USB power from a type A mains power outlet
  5. USB to Apple 30 pin cable - This connects compatible iPhones, iPods and iPads to a USB port for charging, syncing and playing music
  6. http://www.iec.ch/worldplugs/typeB.htm - Type B power outlet
  7. Type B USB power adapter - Provides USB power from a type B mains power outlet
  8. 4 Port USB Wall Charger - A universal USB charger capable of charging up to 4 USB devices with swappable international adapters