You can also turn off cellular data to prevent any cellular data usage.

Turn off Cellular Data: In Settings, choose General > Network, then tap the Cellular Data switch to turn it off.

Set iPhone to add the correct prefix when dialing from another country: In Settings, tap Phone, then turn International Assist on. This lets you make calls to your home country using the numbers in your contacts and favorites, without having to add a prefix or your country code. International Assist works for U.S. telephone numbers only.

When you make a call using International Assist, “International Assist” appears on the iPhone screen, alternating with the “calling …” message, until your call is connected.

Note: International Assist may not be available in all areas.

Set the carrier to use: In Settings, tap Carrier, then select the carrier you prefer. This option is available only when you’re traveling outside your carrier’s network. You can make calls only on carriers that have roaming agreements with your iPhone service provider. For more information, see “Carrier” on page 190.

Get voicemail when visual voicemail isn’t available: Dial your own number (on a CDMA model, dial your number followed by #), or touch and hold “1” on the numeric keypad.

You can use Airplane Mode to turn off cellular services and then turn Wi-Fi on to get access to the Internet, while preventing voice roaming charges.

Use airplane mode to turn off cellular services: In Settings, tap Airplane Mode to turn it on, then tap Wi-Fi and turn Wi-Fi on. See “Airplane Mode” on page 187.

Incoming phone calls are sent to voicemail. To make and receive calls again and get your voicemail messages, turn airplane mode off.

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Chapter 5    Phone

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Apple MD146LL/A, MC603LL/A, MC610LL/A, MC678LL/A, MC604LL/A, MC537LL/A, MC606LL/A, MC679LL/A, MC603C/A, MC605LL/A, MC318LL/A Phone
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MC603C/A, MC609LL/A, MC606LL/A, MC678LL/A, MC603LL/A specifications

The Apple MD128LL/A, MC679LL/A, MC608LL/A, MD127LL/A, and MC605LL/A are renowned models from Apple's extensive lineup of devices, primarily comprising MacBook Pro and MacBook Air systems. Each of these models showcases Apple's commitment to innovation, reliability, and performance, catering to a broad range of users, from everyday consumers to professionals requiring high-powered computing.

The MD128LL/A, also known as the MacBook Air (13-inch, Mid 2013), integrates Intel's fourth-generation Core i5 processor, leading to improved performance and energy efficiency. It features a crystal-clear display with a resolution of 1440 x 900 pixels that provides vibrant colors and sharp text, making it ideal for both work and entertainment. The solid-state drive (SSD) configuration ensures fast boot times, quick application launches, and seamless multitasking, significantly enhancing the user experience.

Turning to the MC679LL/A, this model relates to the MacBook Pro (Retina, 13-inch, Early 2013). It boasts a Retina display with a resolution of 2560 x 1600 pixels, delivering exceptional clarity and detail. The Intel Core i5 processor, alongside the Intel HD Graphics 4000, enables efficient handling of graphic-intensive applications. The integrated 720p FaceTime HD camera, coupled with high-fidelity speakers, enhances video conferencing and media consumption.

The MC608LL/A represents another variant within the MacBook Pro series, featuring similar specifications as the MC679LL/A but offering different configurations for storage and RAM. Its robust aluminum chassis provides durability while maintaining a sleek, portable form factor. The laptop's energy-efficient design extends battery life, allowing users to stay productive for extended periods.

On the other hand, the MD127LL/A and MC605LL/A are earlier iterations of the MacBook Air and MacBook Pro models, respectively. With the MD127LL/A, users experience Intel's dual-core i5 processor, ensuring efficient performance across various applications. Its lightweight design and impressive battery life make it perfect for users on the go. The MC605LL/A, associated with the MacBook Pro (13-inch, Early 2011), may be older but still offers a capable performance with its Core i5 processor, alongside a dedicated AMD graphics card, making it suitable for entry-level gaming and graphic design tasks.

Overall, the MD128LL/A, MC679LL/A, MC608LL/A, MD127LL/A, and MC605LL/A represent a significant evolution in Apple’s laptop offerings, combining advanced technologies, powerful performance, and exceptional design, thus catering to a diverse array of user needs and preferences. Whether for casual use, professional tasks, or creative endeavors, these models stand as testaments to Apple’s enduring legacy in the computing landscape.
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