*** UPDATE -- free AAL ends COB Thursday, 9/24! ***
It appears that another T-Mobile "Line On Us" for existing customers is coming this Friday. No word on the duration of the promo. Voice lines only.
It also allegedly stacks with the prior free lines. I'll update with any cheap/free phone deals that may be available...
https://www.reddit.com/r/tmobile/...in_on_918/
Link to Megathread (will be updated when/if T-Mobile posts a promo page):
https://www.reddit.com/r/tmobile/...r_account/
Eligible rate plan SOCs (OCR'ed -- apologies for typos):
10BFM2L
10BFM4L
10FMBZ2L
10FMBZ4L
10FMSC2
10FMSC4
10SCFM2L
10SCFM4L
1PLSALL
1PLSALL9
6BFM2L
6BFM2LN
6BFM4L
6FAMBZ2L
6FAMSC2
6FMBZ2L
6FMBZ4L
6FMSC2
6FMSC4
6SCFM2L
6SCFM2LN
6SCFM4L
FRLTUL4LP
FRLTULF2
FRLTULFM2
FRLTULFM9
FUL8PRDOM
FUTTVN
FUTTVN8
FZLTUL4LP
FZLTULF2
FZLTULFM9
LTULFM2
LTUNLFM9
MAGENTA2
MAGENTA9
MAGPR2TI
MGPLSFM
MGPLSFM9
NAFUTT
NAFUTT2
NAFUTT2P
NAFUTT4
NAUTTF
PFRLTULF2
PFZLTULF2
PRFT5SC
PRFTL8SC
PRLUTTVF
PRSCFUBD
SCFUTT4
SCFUTT6
SCFUTTBD
TIUL4L
TIULFM9
TIUNL2
TIUNL9
TM1PR2
TM1TI2
TM1TI9
TMESNTL2
UBFM2L
UBFM4L
USCFM2L
USCFM4L
Z1PLSALL
Z1PLSALL9
ZBPUNL2
ZBPUNL9
ZBUNL2
ZBUNL9
ZLTULFM2
ZLTUNLFM9
ZMAGENTA2
ZMAGENTA9
ZMAGPR2TI
ZMGPLS
ZMGPLS9
ZNATTU2
ZTITUL4LP
ZTIULFM9
ZTM1PR2
ZTM1TE2
ZTM1TE9
ZTM1TI2
ZTM1TI9
ZTMESNTL2
ZTMONE9 [redd.it]
Look up your SOC code (pasted from prior deal thread -- can't create a Wiki for some reason):
How do I look up my SOC code?
If you want to know what your SOC code is, login using a web browser so you are looking at your account. Be sure to enable "Web Console". (FireFox --> Menu --> Web Developer --> Web Console) Pop over to the Network tab and look for an XHR request to "Subscriber".
you'll see your SOC Code in the Response section. For example, here is the relevant section:
````
{
"ratePlan": {
"name": "Simple Choice North America 10GB Family Match Promo",
"planType": "SIMPLECHOICE",
"socCode": "10SFM2LN"
}
}
````
You need to be on the "home" URL when you enable the tools. I've attached a screenshot that shows (circles) all of the areas you should be at or click to ensure you can see the SOC Code. Sorry if this is too complicated - just trying to share info.
https://imgur.com/LSM3ayP
(Credit: /u/double-xor on Reddit)
For your plan code view in Chrome:
View>Developer>JavaScript Console. Then tap Network tab then XHR tab.
Then go to the main T-Mobile account homepage (the magenta square with white T in the upper left…or refresh it if already there).
In the Java window, single-tap Subscriber (or type it in the Filter search tab if you can't find it, then single-tap Subscriber)
Tap Response tab (if not already selected). In that long string, you will find the plan and socCode.
https://www.t-mobile.com/ 
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2,457 Comments
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With the "FREE" line, I'm thinking of porting it out and then back in to save $25 a month
My current plan is attached below with the promo. Five lines total , 3 of them for free.
Get a FREE line.
Add a voice line for free to an eligible plan with two or more existing lines.
Subject to change. Free new line for accounts with 2 to 11 voice lines; plus taxes & fees for accounts currently paying for a T-Mobile wireless line with additional taxes & fees. Qualifying credit and Magenta, Essentials, ONE, Business Unlimited, or Simple Choice plan required. Credits may take up to 2 bill cycles; credits will stop if you cancel any lines. Limit 1 offer per account.
​
Nope! it's a free phone when you add a line and port in. I would apply hookup to one of the 2 ATT lines, open your tmobile account and get 3 lines, port in the 2 ATT, third line will be a free one, and then on Friday get another free line, leaving you with 4 for $96 on magenta.
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Magenta (9 line) 1
BYOD 3in1 SIM Card 1
ASSISTED SUPPORT 1
Magenta Data 1
Magenta (9 line)
Did the rep screw up and change my account type? Anyone else see this? On hold now to get answers but they are slammed with calls.
I'm on magenta + two paid lines
Rep was aware and did several today already. Painless, well until the bill comes in and its wrecked. Fingers crossed.
Magenta (9 line) 1
BYOD 3in1 SIM Card 1
ASSISTED SUPPORT 1
Magenta Data 1
Magenta (9 line)
Did the rep screw up and change my account type? Anyone else see this? On hold now to get answers but they are slammed with calls.
Hopefully you have it in writing as it would be so much easier for them to see for themselves and reverse the change.
https://slickdeals.net/f/14153606-t-mobile-offer-existing-single-line-or-new-customers-get-a-3rd-line-free-via-monthly-bill-credits
In the wiki:
What are some of the stipulations with this?
As long as you are on a plan that qualifies and have at least two paid voice lines, this is what one SD user BongH was told by a T-Mobile rep: "There is no trade, no additional lines needed, you just add the line. You wouldn't be able to cancel any lines for one year after adding that line and then after that year, you have to have two paid lines outside the free line to keep the promo going."
Rep was aware and did several today already. Painless, well until the bill comes in and its wrecked. Fingers crossed.
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