I do that all the time between my iPhone 6 and Lumia windows phone.
If you sign out of iMessage in the iPhone settings before switching the sim, you should have no issues with receiving your text messages.
I switch mine almost daily.
Yeah, I lucked out my Lumia 830 uses the same sim as my iPhone 6If these use different sims (my old lumia 1520 used the same nano sim as iPhone 6+), he will need a sim adapter. If you have to do this a lot, it can be a pain.