I just changed my SIM card which could be a reason as to why this is happening but it’s not happening to me with anyone else. My girlfriends messages are coming through to me and mine are sending very slowly to her but both of ours are in green (we both have iPhones and are connected to wifi/data) This just started happening this evening and I don’t know why?! I’ve restarted my phone a few times and so had she and she tried deleting the conversation once and texting me again but nothings working. Please help!!

I’m saying the time in the text so she can see how long it takes to send