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But a standalone GPS doesn't necessarily need a quick Time To First Fix (TTFF). They're usually powered up before hiking or driving or flying. After that, their larger antenna and multiple channels allow them to keep up even in most reception conditions.

A phone is different. It's often in a pocket or purse. It has limited battery. The GPS section is often powered down. When a person wants to use a location based service, they want the answer promptly, or they'll lose interest. They're often indoors as well. Thus the need for quick TTFF assistance.

I think consumer standalone GPS's would be more useful with a decent TTFF. Just cuts down on that wait at the start. I would have thought that most GPS systems would want to incorporate some assisted GPSness?
Standing around waiting for your Forerunner or Garmin handheld to fix is a bit boring when you could be hitting the trail...
 
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