iMessage issues with just one other person - also on Vodafone

[odyssey25]

Hi, I recently ported my number back to Vodafone with new contract - iPhone 16 Pro. I can send and receive iMessage with other contacts with no problem except my daughter. She has an iPhone 13 and is also on Vodafone. We keep having to send as text messages as iMessages fail to send to each other, but sometimes iMessaging does work. She also doesn't have this issue with any of her other contacts. Any suggestions please as this is very frustrating!

[Gemma]

Hi @odyssey25 - thanks for reaching out. This does sound frustrating. Am I reading this right, that this is an intermittent issue between yours and your daughters phone? So sometimes the iMessages are going through to her phone from you? If so, this might be when one of you are losing an internet connection. One test would be to delete your daughters mobile number from your phone and then resave it. 

[odyssey25]

Yes that's correct. It's really odd as her partner is at the same location also on Vodafone and we don't have any issues. Will definitely try deleting her number and resaving it - will also ask her to do the same