T-Mobile is again offering new and existing customers a FREE line of service for a limited time. To qualifying, existing customers must have 2 or more lines and for new customers, they must add 2 lines with the 3rd being Free. For existing customers, you must be on one of their qualifying plans that falls under one of the following SOC Codes shown in this image. SOC (Service Order Code) is the technical term used to describe plans and services that are added to customers’ accounts within T-Mobile’s billing systems. Taxes and fees may apply depending on your existing plan. This may include a SIM or activation fee, which could be possibly be waived later. To get this offer, contact T-Mobile customer support online (through their app, texting 611 on a T-Mobile phone, T-Force FB Messenger or Twitter) or through the phone and ask if your plan qualifies. This promo is called: 2021 Line On Us P6. The Free line will be provided in the form of monthly bill credits and they will end if you cancel any lines This offer is reportly stackable with some of T-Mobile’s Free phone offers when you port in a line.