Hey Chris thanks for your quick answer !
I think this is specific for phone number… In France we don’t use this format of phone, so it doesn’t really help me.
And in fact I want to fix this issue on all field that have mask, not only phone number because I have like 10 fields that have mask.
EDIT :
Tried this code (look like same code as your link) :
It work on the first page of my multipage form… I also wait that the page is loaded to strike the JS code but for now It dont work on field that are on other page.