I have an 021 number on 2degrees, and I have a friend on Vodafone. Txt messages he sent to me since Saturday almost never arrive, messages I send to him sometimes arrive. This morning a text he sent me worked, and my reply got to him, but then an hour later another txt didn't arrive. He uses a cheap android phone, but I can see the text messages in his sent folder.

Txt messages to my girlfriend who's also on Vodafone seem fine.

Is anyone else having similar problems?