This started a few months ago when I dial my sister. We are both with virgin mobile and I would hear "you have dialled an incorrect number" it's not incorrect we've had the same numbers for over 15 years.
My sister has an iPhone, she always has this make. My last phone was an iPhone I'm now using a Samsung galaxy. We've both had new sim's yet this keeps happening but only with her number.
I can send a text, she can ring me but if I try to reply I keep getting the same thing.
It's random. Some days I get through some days I don't. Today I have not been able to ring my sister all day. I text her to ring me, she did. I told her I would try ring her back but the call wouldn't go through.
It's the only number in my contacts this happens with.