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If you carry a cell phone, you also have a calculator. Pretty much every mobile phone on the market has one, so you have no excuse not to do some intelligent per-unit math while you're out shopping.
The SAR value is then measured at the location that has the highest absorption rate in the entire head, which in the case of a mobile phone is often as close to the phone's antenna as possible. Measurements are made for different positions on both sides of the head and at different frequencies representing the frequency bands at which the ...
For very low-power systems, such as mobile phones, signal strength is usually expressed in dB-microvolts per metre (dBμV/m) or in decibels above a reference level of one milliwatt . In broadcasting terminology, 1 mV/m is 1000 μV/m or 60 dBμ (often written dBu).
Since cell phones rely on radio waves, which travel through the air and are easily attenuated (particularly at higher frequencies), mobile phones may be unreliable at times. Like other radio transmissions, mobile phone calls can be interrupted by large buildings , terrain, trees, or other objects between the phone and the nearest base.
There once was a time when phones that flipped open and had a keyboard were all the rave -- and now, these same phones are worth a surprising value. Your old cell phone may be worth more than you ...
Apple's flagship phone answers the call for users who want the largest possible screen — in this case an expansive 6.7 inches. That makes icons easier to identify, text easier to read and videos ...
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