The question was not how do I buy a smartphone which is invulnerable to patent attacks/lawsuits, but how can I avoid supporting this kind of predatory corporate

The question was not how do I buy a smartphone which is invulnerable to patent attacks/lawsuits, but how can I avoid supporting this kind of predatory corporate behaviour (Apple, Google, MS were listed as examples). I agree open source handsets (as far as they can be) would also be vulnerable to software patent attacks, but we could at least support companies which don't engage in such attacks.