Photoclubalpha

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Hmmm, have to be a bit cautious on this one. Neat idea..however
Many phones don't really have what you would call nice IQ..so I wonder if it's worth the hassle
2nd, your phone will become rather bulky with those things stuck on! And in the case of some slider models..you won't be able to use them anyway..as the back cover will hit it!

I always cary cell phone with me.

It works by attaching to the phone a self sticking ring and the lens has a magnet I think that will stick to the ring.

The wide angle may be OK for emergencies.

Nokia and Samsung have cell phones with 3:1 zoom.