> If you don't trust Nokia, don't use their phones.

There's a rather big difference in trusting their phones vs. trusting their services in this case:

Mobile network vendors (including Nokia's NSN) have a record of being very very helpful in supporting government wiretapping. see eg http://www.washingtontimes.com/news/2009/apr/13/europe39s-te...

This is a much bigger problem in China, etc (the "emerging markets" under discussion) than in the west.

It's much less likely they've built backdoors into the handset, and if they do they risk getting caught.

> They are providing a service that users are opting in to use.

No, there's no opting in to the violation of end-to-end security here.