Hi,
I've been using O2 for years. In the last 2 weeks I've noticed, that more often than not, the call quality has been similar to that of a Skype call, rather than a traditional mobile/telephone call. Sometimes, the call starts off crystal clear and then slowly degrades back to "usual" quality, but I've had a few calls that were 100% perfect.
I'm not complaining in the slightest, but has anyone got an idea of what's going on?!
Cheers,
David