If I can't use data on my iphone can I use Wi-Fi?

If I can't use data on my iphone can I use Wi-Fi?

Yes. You need a Wi-Fi that is stable and allows you to download. Find out if there are charges incurred. Also, public Wi-Fi is not too secure, so please do not make credit card purchases or send confidential data over public Wi-Fi.

Yes.

You can use your phone, you should have a good Wi-Fi connection to work properly.