iPhone with iPad together can be access with other iPhone ?

None of your devices can be accessed directly by other devices. You can, however, share data and services among your devices that are signed on with the same Apple ID. For example, you may have an iPad and an iPhone signed on with the same Apple ID and both devices will share Messages, Photos, Contacts, Notes, Calendar events etc.

To answer your question, another device that is not using the same Apple ID as yours, will not be able to share any information.

Axel F.