How to charge the iPhone 3GS when staying in Guam

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

Guamanian power outlet

Varying different combinations of voltages and standards can often be confusing when planning to travel to a different country if you've never visited before. This page has useful instructions showing you exactly how to charge the iPhone 3GS when you are in Guam by using the standard types B or A Guamanian 110 volt 60Hz wall outlets. If the iPhone 3GS does not power up or charges slowly when visiting 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 220 volts may take longer to charge or won't power up, so check that the iPhone 3GS is dual voltage (you'll find these are usually indicated by 100-240 volts) else you may need to use an additional transformer to ensure proper use. These instructions assume that you are running Apple iOS 6 or greater on the iPhone 3GS.

Charging the iPhone 3GS in Guam

Can the iPhone 3GS be used in Guam?

Yes, you can use the iPhone 3GS in Guam.

What is the best travel adapter for recharging the iPhone 3GS 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. 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 3GS 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 which has been successfully tested with multiple USB devices in numerous countries.

Alternative travel adapter for Guam

The 4 port USB travel charger 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. [8] [AD]
What is the best travel adapter for recharging the iPhone 3GS in Guam?

Powering the iPhone 3GS with a Guamanian power outlet by using a 2 pinned Type A USB adapter

Using a USB 30-pin cable with a 2 pinned Type A USB charger to recharge your iPhone 3GS from a Guamanian power outlet.

  1. In order to charge the iPhone 3GS from the Guamanian power outlet you'll need to buy a Type A USB power adapter [4] and a USB to Apple 30 pin cable [5], Apple will typically include the USB cable with your iPhone 3GS.
  2. Plug in the Type A USB power adapter into the wall outlet. This wall supply, sometimes called a Type A power outlet [3], is recognised by the two thin adjacent slots where the blades sit.
  3. Connect one end of the USB to Apple 30 pin cable into the bottom of the mains USB adapter and the other end into the dock connector on the iPhone 3GS. The iPhone 3GS dock connector can be found at bottom of the iPhone 3GS.
  4. Turn on the Guamanian power outlet.
  5. The battery icon which you'll find in the top right hand corner of the iPhone will display a charging icon to indicate that the iPhone 3GS is recharging and takes between one-four hours to completely recharge to 100% capacity.
Powering the iPhone 3GS with a Guamanian power outlet by using a 2 pinned Type A USB adapter

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

A page on how to power your iPhone 3GS from a Guamanian power outlet with an Apple 30 pin cable with a 3 pinned Type B USB adapter.

  1. In order to charge the iPhone 3GS from the Guamanian power outlet you'll need to buy a Type B USB power adapter [7] and a USB to Apple 30 pin cable [5], Apple normally include the USB cable with your iPhone 3GS.
  2. Plug in the Type B USB power adapter in the wall outlet. This wall supply, sometimes called a Type B power outlet [6], is recognised by the two slots where the blades sit with a single semicircle shaped 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 power charger and the other end into the dock connector on the iPhone 3GS. The iPhone 3GS dock connector can be found at bottom of the iPhone 3GS.
  4. Switch on the Guamanian power outlet.
  5. The battery icon that appears in the top right hand corner of the iPhone will display a charging icon to indicate that the mobile is charging which takes around 1 to 4 hours to fully recharge to 100% capacity.
Powering the iPhone 3GS with a Guamanian power outlet by using a 3 pinned Type B USB adapter

See also

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  1. Wikipedia - Guamanian page on wikipedia.org
  2. Apple - official iPhone 3GS user guide
  3. iec.ch - Type A power outlet
  4. Type A USB power adapter - An unearthed Type A USB charger has 2 parallel rectangular flat blades with small holes near the tip of each blade, C$15-C$20.
  5. USB to Apple 30 pin cable - This connects compatible iPhones, iPods and iPads to a USB port for charging, syncing and playing music, estimated price under C$15.
  6. iec.ch - Type B power outlet
  7. Type B USB power adapter - 3 pinned Type B USB chargers have a single unearthed round pin along with 2 shorter parallel rectangular flat blades with small holes in the end of each blade, costing under C$20.
  8. 4 Port USB Wall Charger - A universal USB charger capable of charging up to 4 USB devices with swappable international adapters, under C$20.