Didn't see this posted. Thought, this might be useful for people buying new lines. FYI, I saw this on my account and I didn't try this myself.
Switch to T-Mobile, get the hottest phones & save big! For a limited time, visit any T-Mobile retail store, purchase a qualifying new smart phone & activate a new line to earn 12,000 SB!
Existing T-mobile customers purchase a qualifying new smart phone & add a new line to earn 12,000 SB!
Earning your SB is easy. Please follow the following steps to earn*:
1. Visiting any US T-Mobile branded retail store between 11/22 and 12/31/2017, purchase a new post-paid smart phone** in-store and activate it as part of a new account or as an additional line on your existing account.
2. On your purchase receipt, circle your phone purchase (with your phone's IMEI #) and your TMO Sim Starter Kit (with your mobile number). If you don't see these on your receipt, don't worry.
3. Take a picture of your receipt and upload it to this page.
4. When T-Mobile validates that your purchase is valid and your account is active, you will earn your SB. This will take up to 30 days from the day you upload your receipt.
*SB for this offer can only be earned once per member. Only valid smart phone purchases/activations made at T-Mobile branded retail stores in the US between 11/22 and 12/31/2017 are eligible. Your receipt must be valid and unique to earn. Uploading receipts for purchases/accounts that are not your own is prohibited. Your smart phone and the account you activate the phone on must be post-paid. Your account must be active and in good standing for at least 60 days from purchase to be eligible to earn. Returning your phone or cancelling your activation will disqualify you from earning. SB can take up to 30 days from the day you upload your receipt to post to your account. Receipts must be uploaded by 11:59 PM PST on 12/31/2017 to be eligible.
**Only smart phones are eligible. Pre-paid phones/accounts, tablets, non-smart phones, bring your own device, phone upgrades (unless you're adding a new phone purchase to a new line on your account) or accessories are not eligible to earn.