Can you do a phone upgrade form a droid to an iphone?

I got a txt today saying i'm due for an upgrade and I wanted to know can you upgrade from a droid to an iphone? I got a 4g LTE with Verizon.

Yes.

If you qualify for an upgrade you can buy any phone Verizon carries.

Yes. One thing to look out for though, if you pay for insurance on your Android and you switch to the iPhone, the price of the Verizon (Assurion) insurance is usually like $9 or $10 per month for the iPhone vs. The $4 or $5 for Android/other smartphones. If you're not worried about insurance than nothing else should be affected by you changing to an iPhone.

Side Note: As far as phones though, going from Android to iPhone is more of a downgrade (I'm joking)

Yes. You can upgrade to any phone you want. Does not matter whether it is android or Apple.