If you’re running a small or midsize business on a cellular plan that charges a premium for the basics, T-Mobile for Business is ready to make that a harder position to defend. Right now, new business customers who switch to T-Mobile for Business can get 10 lines for $200 per month on the CoreMobile plan — $20 per line — plus $150 credit per line with no limit on the number of lines. That’s a straightforward offer on a plan built around the essentials, with no annual contract and a 5-year price guarantee locking in your monthly rate on talk, text, and 5G data.
CoreMobile covers what most SMBs actually need day to day. Unlimited talk, text, and 5G and 4G LTE data while on the Best Mobile Network***, with 50GB of premium high-speed data per line.** For a team that’s running calls, email, and cloud apps without heavy media production or field streaming, CoreMobile handles the load without paying for features that never get used. The 5-year price guarantee* is the detail worth underlining — locking in your per-line cost over a multi-year horizon simplifies budgeting in a way that annual contract renewals don’t.
Step Up to SuperMobile
For businesses with more-demanding connectivity needs, T-Mobile for Business’s SuperMobile plan is a different proposition entirely. Add 20 or more lines on SuperMobile and save $1,000 per line — up to $20,000 in total savings via 36 monthly bill credits for new accounts. No annual contract, same 5-year price guarantee*, and a plan built around performance rather than just coverage.
SuperMobile includes unlimited premium data with no high-speed cap**, which matters for teams running video calls, large file transfers, or real-time field data collection throughout the day. The plan also includes Nationwide Network Slice*** — T-Mobile’s 5G standalone feature that prioritizes data and optimizes latency for business traffic in areas with Ultra Capacity 5G coverage — and Threat Protect****, a built-in mobile security layer that runs on capable devices via app. For organizations managing sensitive data or operating in regulated industries, having security baked into the plan rather than bolted on as a third-party subscription simplifies the stack.
The combination of unlimited premium data, network slicing, and integrated security puts SuperMobile in a different category than what most carriers are offering at the business tier. The $20,000 savings figure on a 20-line switch is real money — the kind that offsets device costs, absorbs connection charges, and makes a mid-year carrier switch easier to justify to the people holding the budget.
The Best for Your Business
Both plans run on T-Mobile’s 5G network, which Ookla’s Speedtest Intelligence data named the Best Mobile Network in the U.S. for the second half of 2025*****. No annual contracts on either plan means the commitment is month-to-month once the promotional credits are factored in, which lowers the switching risk considerably.
For SMBs that have been absorbing the cost of a legacy carrier plan on the assumption that switching is more trouble than it’s worth, the current T-Mobile for Business offers make that calculus worth revisiting. CoreMobile covers the essentials at a price that scales cleanly. SuperMobile covers the rest.
*5-Year Price Guarantee: Applies to monthly price on-network talk, text, and 5G data. Exclusions like taxes & fees apply.
**CoreMobile: With Autopay, plus taxes & fees. During congestion, customers on this plan using >50GB/mo. may notice reduced speeds until next bill cycle due to data prioritization. Activate up to HD streaming on capable device, or video typically streams in SD.
***Best Network: Best Mobile Network in the U.S. based on analysis by Ookla® of Speedtest Intelligence® data 2H 2025.
**Activate up to 4K UHD streaming on capable device, or video typically streams in SD.
***Slice: Features available on our 5G standalone network; not available while roaming, via satellite, or while tethering. Slice features (data prioritization and latency optimization) available in areas of Ultra Capacity 5G coverage with capable device and 5G Standalone settings. Coverage not available in some areas.
****Threat Protect: Capable device, app download, and subscription (included with plan) required.
*****Best Network: Best Mobile Network in the U.S. based on analysis by Ookla® of Speedtest Intelligence® data 2H 2025.