can I trade in an iPhone with a broken and non-working display?

They will recycle the broken phone for you for free.

It has no trade in value in its current state

Better off selling it on eBay as damaged / as it for parts and get some $$ then trading it in to get recycled.

klosss wrote:

I hear that apple stores recycle trade in iPhones

Depends on what you mean by "trade in". For a replacement service they always require that the previous phone be handed over. Depending on the extent of the damage or defect they may opt to repair it at a central facility and then put it back in service as a replacement device. But for the trade-in they'll require that it be in good working condition with no obvious cosmetic damage or cracks in the screen.

A perfect iPhone 7 is worth a trade-in value of $140 in the US. The repair cost from Apple for the screen is $149 plus tax. It's not really worth it. If you want to perhaps keep the phone and give it away as a gift, it might be worth having the screen repaired.

They will recycle the broken phone for you for free.

It has no trade in value in its current state.

That may not get accepted for trade-In.

No one wants a broken device.

To trade it in you would need to get it fixed.

You can't trade in a broken device that has no value.

They won’t accept it for trade-in unless it’s a fully working device without any major cosmetic issues.