To start with, you must be outside with a clear view of the sky before you can make calls. While the Iridium Extreme looks like a cell phone, it doesn’t work the same way. The battery will last for several days in standby, and you can talk for 4 hours. It’s extremely rugged, it will withstand being sprayed with water, dropped and covered in dust. ![]() Iridium has made sure that their satellite phone will be there if you need to use it in an emergency. If you wish, you can enter another number that will be called when you press the red button. The first time you power on the phone, it will insist that you tell it whether you want to connect to GEOS or some other contact. The SOS button on the top of the phone can be programmed to connect to the GEOS International Emergency Response Coordination Center, a sort of global 911 service. This gets the part of the antenna that’s transmitting and receiving radio waves clear of your head. The end of the antenna has a three-position tilt feature that allows it to point straight up while you’re using the phone. To use the phone, you must pull the antenna out another 3½ inches. The antenna sticks up 2¼ inches above the top of the phone in its retracted position. On the top of the phone is the satellite antenna, the power button and the red SOS button, which is protected by a tight-fitting rubber cap. There are two soft keys and a scroll button. Like the cell phones of the past, there’s a numerical keypad that also will produce alphabetic characters with multiple button pushes for sending SMS messages. Go here to see eWEEK’s Resource Page on Intent-Based Networking. ![]() The screen is square and monochrome, but it has enough space to show you the phone’s status, satellite signal strength, the number being dialed and to display items from the menu. The Iridium Extreme phone tested for this review is about the size of an iPhone 11 Pro, but it’s twice as thick. The relatively low altitude effectively eliminates latency that can disrupt conversations. The fact that Iridium uses polar orbits means that the satellites can be reached anywhere on earth. In reality, this Iridium phone can reach the company’s 66 satellites circling nearly 500 miles above the earth in polar orbits. In fact, it resembles the earliest handheld cell phones of 20 years ago, what with its black finish, the large external antenna and the relatively small screen. At first glance, the Iridium 9575 Extreme isn’t particularly impressive.
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