Hi Michelle. During a call, check the screen of your phone if there's an option for speakerphone. If nothing like that comes up, press the left soft key for Options. See if the option for speakerphone is there. Let me know if you're able to do it. Good luck!
Go to http://www.att.com/devicehowto/?make=alcatel&model=871a#fbid=YcaBkk8Zuvw
Scroll down and select Calls. Then, select activating speakerphone video when a call comes in. You just press the right soft key to turn the speakerphone ON when you answer an incoming call.