the primary source of the RF—and the person's head. The exposure to RF from mobile phones in which the antenna is located at greater distances from the user (on the outside of a car, for example) is drastically lower than that from hand-held phones, because a person's RF exposure decreases rapidly with distance from the source. The safety of so-called “cordless phones,” which have a base unit connected to the telephone wiring in a house and which operate at far lower power levels and frequencies, has not been questioned.

How much evidence is there that hand-held mobile phones might be harmful?

Briefly, there is not enough evidence to know for sure, either way; however, research efforts are on-going. The existing scientific evidence is conflicting and many of the studies that have been done to date have suffered from flaws in their research methods. Animal experiments investigating the effects of RF exposures characteristic of mobile phones have yielded conflicting results. A few animal studies, however, have suggested that low levels of RF could accelerate the development of cancer in laboratory animals. In one study, mice genetically altered to be predisposed to developing one type of cancer developed more than twice as many such cancers when they were exposed to RF energy compared to controls. There is much uncertainty among scientists about whether results obtained from animal studies apply to the use of mobile phones. First, it is uncertain how to apply the results obtained in rats and mice to humans. Second, many of the studies that showed increased tumor development used animals that had already been treated with cancer- causing chemicals, and other studies exposed the animals to the RF virtually continuously—up to 22 hours per day.

For the past five years in the United States, the mobile phone industry has supported research into the safety of mobile phones. This research has resulted in two findings in particular that merit additional study:

1In a hospital-based, case-control study, researchers looked for an association between mobile phone use and either glioma (a type of brain cancer) or acoustic neuroma (a benign tumor of the nerve

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Motorola T722i manual

T722i specifications

The Motorola T722i is a notable mobile phone that emerged in the early 2000s, reflecting the era's transition from basic mobile devices to more feature-rich models. This clamshell-style phone became popular for its compact design, robust features, and user-friendly interface.

One of the key characteristics of the T722i is its compact and stylish clamshell design, which not only enhances portability but also protects the keypad when not in use. The device is available in multiple colors, allowing users to express their individuality. The hinge mechanism is sturdy yet smooth, contributing to the overall durability of the phone.

In terms of display, the Motorola T722i features a monochrome screen with a resolution of 128 x 64 pixels. While it may not compare to modern smartphones, the display offers clear visibility for text and basic graphics, which was adequate for its time. Additionally, the internal LCD screen is complemented by an external display, allowing users to see incoming calls and notifications without opening the phone.

The T722i is equipped with various essential features, including predictive text input, a basic calendar, and customizable ringtones. With an impressive battery life, the device can support extended use, making it suitable for users who rely on their phones for communication throughout the day. The talk time and standby time were considered exceptional for the era, providing a reliable experience for on-the-go users.

Connectivity-wise, the Motorola T722i supports GSM networks, which ensures compatibility with many service providers. This capability also paved the way for international roaming, appealing to frequent travelers. The phone supports SMS messaging, allowing users to quickly send and receive text messages, a significant mode of communication in the early 2000s.

Another notable feature is its compatibility with various accessories, including headsets and data cables, enabling users to personalize their experience further. Additionally, the T722i supports a limited selection of downloadable ringtones and wallpapers, giving users a chance to customize their device.

Overall, the Motorola T722i stands as a testament to the early days of mobile technology, blending style, functionality, and reliability. While it may seem basic by today’s standards, it laid the groundwork for the advancements that would come in mobile phones in the following decades.