How do I save my text messages and text photos before getting a new number?

I am a currently a Koodo customer and I have both a Koodo home phone number and a Koodo cell phone on the same account. I plan on only keeping the home phone number and transferring it to my cell phone.

Before doing this, it occurs to me that I should save the text messages and photos from my old cell phone number as I think that all those messages and photos will be deleted?  Any ideas on how to go about this? I use an iPhone.

Any help appreciated, thanks!