I know it's not a dream but... Am I being spoofed?

[AmethystDragon]

Okay, so thing is back then in 2016 my phone number called my sister's phone, and no! I did not have a data plan, and I still don't. So on Wednesday I was just really bored and was playing around, so I went to my default messaging app and tries sending a message. And of course it didn't work because it's no data plan. So I went to my messaging app that I use now (Nextplus) and I texted my out of service number and I said "Yo!" So then yesterday, I plug my phone up, power it on and the next thing I know I look in my notification bar, I look at the Nextplus text and it says.... "Yo" and of course I'm freaking out like "OMG what the heck is this?! So me being curious, I responded back with "Oh jeez! What the!? OK, I don't know you, but I was just seeing if someone else actually had my number, that I cannot use anymore." So uuuuuummmmmmm.... Can someone kinda help to explain what's happening? Also the reason I don't write in the dream journal is because, when I press it, it presses the button search.