Hi @Olaideoba, thanks for posting and welcome to our community.
Also, thanks for joining us as a customer. I thank goslow for giving you the correct advice, regarding the landline service and in relation to handsets. When you do purchase a telephone handset, you should already have the necessary attachment to enable you to connect your phone to your hub, as per here. This also provides a step-by-step instruction on how to connect your handset. If you need any further assistance, please do reach out to us?
Regards
Lee_R