T-Mobile One plan simplified further, all additional charges now under single fee
T-Mobile CEO John Legere announced on Thursday at the Consumer Electronics Show that the company has executed its plan to only offer T-Mobile One going forward, is keeping the cost of the plan the same, and is eliminating all extra line-item charges in the program.

The T-Mobile One Plan fee remains unchanged. Users still pay $70 for the first line, $50 for a second line, and $20 per additional line up to 10 lines of service. Starting in January, all of the miscellaneous line-item fees customarily seen on a mobile bill are being absorbed into the plan by the company.
Further enticing people to switch over, T-Mobile will also receive a $150 gift card for every line transferred to T-Mobile, with no trade-in required to get the benefit.
Other traditional T-Mobile benefits are included, like data roaming in Mexico and Canada, "carrier freedom" programs where T-Mobile helps cover the cost of switching data plans, and the T-Mobile Tuesday customer bonus program.
Additionally, to lessen the monthly bill further, every line on the T-Mobile One plan that does not exceed 2GB of data consumed will see a $10 credit.
T-Mobile launched the One plan in September, with unlimited 4G data, calling, and text messaging. Tablets can also be added to the plan, for $20 per month. Customers who opt out of auto-pay services see a $5 per line fee assessed.
Customers using more than 26GB of high-speed data per month may still see data traffic prioritized to 3G or 2G speeds, at specific times and places that the network sees high network demand. There is no cap to induce full-time throttling implementation.
Every video service under the aegis of "Binge On" is streamed at standard definition. Higher definition video is available, but at a $15 per line cost. Day passes are available for a single device for $3.
Customers are allowed to remain on an older, now discontinued, plan.

The T-Mobile One Plan fee remains unchanged. Users still pay $70 for the first line, $50 for a second line, and $20 per additional line up to 10 lines of service. Starting in January, all of the miscellaneous line-item fees customarily seen on a mobile bill are being absorbed into the plan by the company.
Further enticing people to switch over, T-Mobile will also receive a $150 gift card for every line transferred to T-Mobile, with no trade-in required to get the benefit.
Other traditional T-Mobile benefits are included, like data roaming in Mexico and Canada, "carrier freedom" programs where T-Mobile helps cover the cost of switching data plans, and the T-Mobile Tuesday customer bonus program.
Additionally, to lessen the monthly bill further, every line on the T-Mobile One plan that does not exceed 2GB of data consumed will see a $10 credit.
T-Mobile launched the One plan in September, with unlimited 4G data, calling, and text messaging. Tablets can also be added to the plan, for $20 per month. Customers who opt out of auto-pay services see a $5 per line fee assessed.
Customers using more than 26GB of high-speed data per month may still see data traffic prioritized to 3G or 2G speeds, at specific times and places that the network sees high network demand. There is no cap to induce full-time throttling implementation.
Every video service under the aegis of "Binge On" is streamed at standard definition. Higher definition video is available, but at a $15 per line cost. Day passes are available for a single device for $3.
Customers are allowed to remain on an older, now discontinued, plan.

Comments
The four of us got sick of pesky overage fees, so now the "no overage" version is $135, plus $20 per line. $160 per month
via T-Mobile seems great with the gift card poaching, but before considering jumping, how is T-Mobile reception in San Francisco?
We used 32GB of data* last month.
* - not including "free" streaming data. I can't see it any more, but I would guess that adds another 8, mostly from a heavy TV watcher, no not the kids - my mother-in-law!!
Why did this matter? Because as I click thru video streams, it buffers much faster than I can view, and that data is then wasted when I surf over to the next stream. The net result is that with Verizon I consume a few hundred megabytes of data, wheras with Tmobile I consume gigabytes for the same experience. So my data allocation was used up in a few days under Tmobile, whereas it lasted all month on Verizon.
Again, this only mattered because Tmobile lyingly refers to 3G as equal to LTE speeds, and doesn't discriminate between them for billing purposes.
The new plan offers lots of data, so this isn't such an issue. However, the $70 month is a lot more expensive than the $50 I was paying previously. Add to this the more limited range of coverage, and Verizon still ended up being the better option for me.
Update: I see all the extra regulatory fees on my account would be included as well - they add up to about $23 (not including phone sales tax payments) so this plan is about $17 more than my current plan.
I could also keep my data under 2GB/month as I'm usually right around that so I could cut another $10. No one else is close to 2.
I switched from ATT to TMobile when they had the "Test Drive" they shipped me an iPhone, i tested it for a week, i shipped it back.
TMobile was better than ATT in my house, but worse at work. But TMobile had their cell network over WiFi up & running, so it was a no brainer.
TMobile, 4 lines 2 GB/month $129.14 all in - we were paying more than that for 2 lines on ATT.
We will eventually upgrade to the all-in plan, but at this point we would still be paying more. Due to wifi being everywhere we are, and having very short commutes, the highest data usage i have ever seen on any of the lines was 1.5 GB - typically around 500 MB per line, per month.