https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2515082#M75552 I am currently using Verizon wireless as my carrier and they removed the settings for Call waiting, even though my Samsung phone is unlocked, Fri, 24 Feb 2023 20:36:39 GMT user_ams007 2023-02-24T20:36:39Z https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2514975#M75543 <SPAN>I do not have an option called supplementary service on my Samsung s21 ultra. So how do I turn on call waiting</SPAN> Fri, 24 Feb 2023 17:58:46 GMT https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2514975#M75543 nykamp 2023-02-24T17:58:46Z https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2514980#M75545 <P><a href="https://us.community.samsung.com/t5/user/viewprofilepage/user-id/22524306">@nykamp</a>&nbsp;In that situation you may need to contact your carrier to have it enabled.&nbsp;</P> Fri, 24 Feb 2023 18:12:03 GMT https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2514980#M75545 LongHiker 2023-02-24T18:12:03Z https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2515082#M75552 I am currently using Verizon wireless as my carrier and they removed the settings for Call waiting, even though my Samsung phone is unlocked, Fri, 24 Feb 2023 20:36:39 GMT https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2515082#M75552 user_ams007 2023-02-24T20:36:39Z https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2515171#M75559 It's seems that some carriers like Verizon wireless are removing the call settings from devices even unlocked Fri, 24 Feb 2023 22:29:31 GMT https://us.community.samsung.com/t5/Galaxy-S21/Supplementary-service/m-p/2515171#M75559 user_ams007 2023-02-24T22:29:31Z