Phone trying to set up after turning on phone.
Earlier today I turned off my phone after my imessages stopped working properly (They wouldn't send, only text messages). When I turned the phone back on, it brought me to the "hello" screen and wanted me to set up the phone using Wifi.
I don't want to set up my phone and lose 3 years worth of notes and messages. However, even if I try to do the set up I get an activation error where it tells me to restore the phone and install latest version of IOS.
Strangely, the phone still has my passcode, still knows my wifi password, and still can take screenshots, which I've been able to upload to my computer.
Connecting to Itunes gives me the same error message. Please help me, I really do not want to lose all my stuff randomly like this.
iPhone SE