Purchases made via links on this site may earn us commission.

It’s once again time for an add-a-line promotion, and this time it’s half off new lines.

Beginning July 23rd new or existing customers on qualifying rate plans can add a line to their account and get it for half it’s usual cost for life. What makes this interesting though is there’s a limit of 6. You can add up to 6 new lines and get them all for half off. However, it appears T-Mobile is limiting this to lines 3-8 only, so 9+ line plans are ineligible.

The news once again comes via a few documents shared with The T-Mo Report, embedded below, and also the T-Mobile investor press release, found here. T-Mobile is referring to it as a Back to School promotion.

This time around, it appears Simple Choice plans are ineligible. This matches previous speculation from the last time a line promo was available, suggesting that the recent free unlimited data promotion for grandfathered plans caused an issue where new lines can no longer receive a free data plan, thus future free and discounted line promos will no longer work on Simple Choice plans.

Also worth noting is some Sprint plans are also eligible. Those include the UFA, Unlimited Freedom, Unlimited Value/Unlimited Savings, and Sprint Essentials plans.

As usual, discounted and much older rate plans are ineligible, including Value Essentials, Select Choice, Military, 55+, Amplified, Enterprise plans, no credit check plans, and government plans.

UPDATE 7/21/21: We now have a list of eligible SOC codes, and it appears things have changed quite a lot. 9+ lines are no longer excluded. The new SOC codes are as follows:

  • 1PLSALL9
  • FRLTUL4LP
  • FRLTULF2
  • FRLTULFM2
  • FRLTULFM9
  • FZLTUL4LP
  • FZLTULF2
  • FZLTULFM2
  • FZLTULFM9
  • LTULFM2
  • LTUNLFM9
  • MAGENTA2
  • MAGENTA9
  • MGNTA2
  • MGNTA9
  • MGPLSFM
  • MGPLSFM9
  • MPLS9
  • MPLSFAM
  • PROESS2
  • TIUL4L
  • TIULFM9
  • TM1TI2
  • TM1TI9
  • TMESNTL2
  • Z1PLSALL
  • Z1PLSALL9
  • ZBPUNL2
  • ZBPUNL9
  • ZBSUNA2TE
  • ZBSUNB2TE
  • ZBSUNB2TI
  • ZBSUNC2TE
  • ZBSUNC2TI
  • ZBUNL2

To check your plan’s SOC code, you can use our SOC checker tools for Chrome and Firefox. Simply install the extension, sign into your account, and then click the T logo in your URL/extension bar. Alternatively, you can check manually using the guide found here.

This offer is stackable with phone promos as well, including free with add a line phones. Currently those free phones include the OnePlus Nord N200 5G, the Samsung Galaxy A12, the Samsung Galaxy A11, the T-Mobile REVVL 4, the Motorola moto g play, and the T-Mobile REVVL 4+.

The current BOGO line offer, detailed here, will end on July 22nd. The standard offer of third line free will also (likely temporarily) end on July 22nd.

Customers interested in taking advantage of this offer, called 2021 Line P4, can add a line to their account beginning July 23rd.

Enjoy this post? Consider supporting us on Patreon!
Become a patron at Patreon!