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Origin: The rise of outdoor sports gave birth to three mobile phones

Survival must be equipped with three anti-mobile phone

The three defenses mentioned in mobile phones refer to waterproof, shockproof and dustproof. Why do mobile phones have to be made into an "unbreakable" three-defense cell phone? This is only because users who work outdoors for a long time or perform outdoor activities frequently, because the environment in which the mobile phone is used is rather harsh, ordinary mobile phones are very easily damaged. For example, you may accidentally drop your mobile phone into the water during an off-road or camping event, or you may fall into the soil. If it is an ordinary mobile phone, it will basically be lost. Therefore, some mobile phone manufacturers have put forward the concept of waterproof, shockproof and dustproof for this group of users, and have produced the corresponding products.

The earliest three-defense phones were launched by Ericsson R250Pro in August 1999, followed by a batch of mobile phone manufacturers such as Siemens, Nokia, Panasonic, Sagem and Casio. Among them, Ericsson R310SC launched in 2000 was promoted as a recognized classic product. Also listed on the same period as the R310SC are the Siemens 3518i, Sagem MWX1, etc., and the first three-defense handset of the mobile phone predators, the 6250, was launched in 2001 and has undergone four models of 5210, 5100, 5140 and 5140i. From 2001 to the present, it is basically launched one year. After launching the 3,518i and 3,618 handsets in 2000 and 2001, Siemens took two years. It was not until 2003 that the new three-antenna phone, the M65, was re-launched. This handset was widely praised at the time. The M75, which is not yet available, is also widely expected.

With the rise of outdoor and extreme sports in recent years, the number of users of three mobile phones has also been increasing. Especially after entering 2005, Siemens’ M75 and Casio G'zOne TYPE-R have appeared one after another. Anti-cell phone hot, whether it is long-term outdoor sports or work "shy movement", or living in the jungle of reinforced concrete "cultural people", have a strong interest in the three mobile phones. Therefore, we organized an article about this tripartite mobile parade, hoping to make everyone aware of the tripartite mobile phone and its past help.

To climb, three mobile phones with GPS must not be less

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