Can you put a 4G SIM in a 5G-ready smartphone?

How to use a 4G SIM in a 5G phone: Learn if it's compatible, what features you'll get, and how to upgrade to 5G for faster speeds.

Written by Andy Collins

Updated over 4 months ago

All of our giffgaff SIMs will work on 4G and 5G networks. So you can use any giffgaff SIM in your phone.

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