Wired earpieces
Cellphones used to ship with wired earpieces all the time, but they’re now becoming more and more of a rarity. They can be purchased for well under $10, though, and there are hundreds, if not thousands, of options.
I actually prefer wired earpieces over Bluetooth earpieces. There’s no setup involved, no need to worry about battery levels, and they’re cheaper. They can get all tangled up, though, so there’s that.
Speakerphone
Using your cellphone’s speakerphone feature is another option, of course. Any modern phone should have this feature and most of them work decently enough, but just like with any speakerphone—wireless or otherwise—you run the risk of sounding like you’re in a fishbowl and it’s not ideal when you’re around people who don’t feel like listening to your riveting conversations.
Call forwarding
If you have a landline phone, I think that forwarding your cell phone calls to it is a great option. You still use your cell minutes in most cases, which stings a bit, but call quality can be significantly better.
Check with your carrier to see how to enable call forwarding on your phone. Here are the links for the big four:
AT&T | Sprint | T-Mobile | Verizon
Several smartphones have call forwarding features built into their settings menus, too, so check the user manual for your phone. Assuming you’ve misplaced your manual, as everyone does, you can look it up here.