As long as you have your iPhone, you can share its data connection with your iPad through a process called tethering.

How to Set up Your iPhone’s Personal Hotspot

You have to adjust a couple of settings on your iPhone to get your tablet online.

Does Tethering Cost Money?

Your telecom company may charge you a monthly fee for tethering your device, but most providers now offer the service for free on most limited plans. Since you are drawing from a fixed amount of data, providers don’t tend to care how you use it. To change the password, tap the existing one, enter a new code, and then tap Done. On unlimited plans, some providers like AT&T charge an extra fee while other providers like T-Mobile will slow your Internet speed if tethering exceeds high limits. It is best to check with your carrier to see if it charges any extra fees for tethering. In any case, tethering will use up some of your allotted bandwidth, so yes, it will cost money in the sense that you may need to buy extra if you go over the maximum.