Considering an Omnia

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I'm in a position to get my mom an Omnia for virtually nothing. I have a couple of questions for y'all:

1) Is it usable by someone who has virtually no knowledge of cell phones and computers?

2) Can it do tethering?

If it does tether, I'd set that up for my mom, since there's no way she'd figure that out on her own.

I appreciate any info or opinions you care to share.