A couple of weeks ago, someone I text regularly stopped receiving my texts.
They show as "sent" on my phone and the message details give a timestamp of when they were sent.
I can receive theirs OK and they can receive them from other people on other networks.
Any ideas whether it'd be my end or theirs? As I say, they receive texts OK from others (who are with Vodafone, for example). They're with Lyca.