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they performed cognitive function tests. There were no changes in the subjects' ability to recall words, numbers, or pictures, or in their spatial memory, but they were able to make choices more quickly in one visual test when they were exposed to simulated mobile phone signals. This was the only change noted among more than 20 variables compared.3

2In a study of 209 brain tumor cases and 425 matched controls, there was no increased risk of brain tumors associated with mobile phone use. When tumors did exist in certain locations, however, they were more likely to be on the side of the head where the mobile phone was used.

Because this occurred in only a small number of cases, the increased likelihood was too small to be statistically signiﬁcant.4

In summary, we do not have enough information at this point to assure the public that there are, or are not, any low incident health problems associated with use of mobile phones. FDA continues to work with all parties, including other federal agencies and industry, to assure that research is undertaken to provide the necessary answers to the outstanding questions about the safety of mobile phones.

What is known about cases of human cancer that have been reported in users of hand-held mobile phones?

Some people who have used mobile phones have been diagnosed with brain cancer. But it is important to understand that this type of cancer also occurs among people who have not used mobile phones. In fact, brain cancer occurs in the

154 C331 specifications

The Motorola C331, released in the early 2000s, is a classic mobile phone that holds a special place in the hearts of many technology enthusiasts. This device was known for its compact design and user-friendly layout, catering to the needs of the everyday mobile user during its era.

One of the standout features of the Motorola C331 is its lightweight and compact form factor. Weighing in at just 85 grams, it easily fits into a pocket or purse, making it a highly portable choice. The phone boasts a 1.5-inch monochrome LCD display, which, although modest by today’s standards, was efficient for displaying essential information such as the time, battery life, and signal strength.

The C331 was designed with simplicity in mind. It featured a straightforward keypad comprising 12 keys that allowed for easy dialing and text messaging. The intuitive interface facilitated access to basic functions without the clutter of unnecessary features. Durable construction earned it a reputation as a robust phone, capable of withstanding daily wear and tear.

Equipped with a long-lasting battery, the Motorola C331 had a standby time of up to 300 hours and talk time reaching approximately 5 hours. This impressive battery performance was a significant selling point, allowing users to stay connected for extended periods without constant recharging.

The phone supported basic connectivity options, operating on GSM networks, which were widely adopted during that time. The C331 provided the essential calling capabilities, along with SMS texting features, allowing users to communicate easily and efficiently.

Despite its lack of advanced technologies such as cameras or internet connectivity, the Motorola C331 was celebrated for what it did well: reliable performance, efficient communication, and durability. Its simplicity appealed to those who preferred a straightforward phone experience without the distractions of modern smartphones.

Overall, the Motorola C331 remains a nostalgia-inducing example of mobile phone design from a bygone era. It represents a time when phones were primarily tools for communication, emphasizing practicality over features. Its legacy continues to inspire appreciation for the foundational technologies that paved the way for today’s sophisticated mobile devices.

Motorola C331 manual 154

Models: C331

Health and Safety

C331 specifications