Setting up a 3-way call on an Android phone is quite handy! You usually start by calling the first person, then tap 'Add call' to dial the second person. Once connected, tap 'Merge calls' to combine them into a single call. It can vary slightly depending on your Android model. Have you tried a 3-way call on your device before, or is this your first time attempting this? Let me know if you run into any specific roadblocks!