T-Mobile Business Plans (2026)

T-Mobile retired the entire “Business Unlimited” name family and replaced it with three new plans: CoreMobile (entry-level, replaces what was roughly Unlimited Edge), ProMobile (mid-tier), and SuperMobile (premium, replaces what was the top-tier Ultimate). The feature set and pricing changed with the rename — don’t assume the plan you were quoted previously maps cleanly to the new ones. If you’re switching from a legacy plan, ask specifically which new plan matches your previous hotspot and data priority levels.

The 5-Year Price Guarantee covers the monthly price for on-network talk, text, and 5G smartphone data only. It explicitly excludes taxes and fees, select limited-time promotional rates, per-use charges, third-party services, and device costs. In our testing of the T-Mobile business plan pages, we found this wording buried in the fine print below the guarantee headline. It means T-Mobile can raise the regulatory fees ($0.30–$4.70/line), change device connection charges, end promotional pricing, or alter add-on costs — and the guarantee doesn’t protect you from any of that. The base plan rate is locked. Everything on top of it isn’t.

No longer — and this catches a lot of businesses off guard. T-Mobile pulled its AutoPay discount for credit card payments. To qualify for the AutoPay discount (which saves $5/line/month on 1–5 lines; pricing is built into the 6+ line rate), you must use a debit card or linked bank account. This change went into effect and has not been reversed. For a business with multiple corporate cards used for expense tracking, this means either setting up a bank draft specifically for your T-Mobile bill or paying the non-AutoPay rate.

The Device Connection Charge (DCC) is a one-time $35 fee per line that T-Mobile applies when you activate a new device or upgrade an existing one on a business account. As of March 27, 2026, T-Mobile expanded this fee to cover devices purchased through the Apple Store, Apple’s website, or Apple’s app — closing the main workaround that existed previously. The fee now applies to virtually every activation path. When building your budget, count $35 per line for every new or upgraded device on your account. On a 10-line onboarding, that’s $350 in connection fees before your first month’s service bill.

The per-line price scales down materially as your line count grows. On CoreMobile: $65 (1 line), drops to $25/line at 6+ lines, $21/line at the published scale. On ProMobile: $85 (1 line), drops to $34/line at volume. On SuperMobile: $100 (1 line), drops to $42/line at volume. The most dramatic savings happen between 1 and 6 lines. For a business adding its 6th line, the per-line economics change enough that it’s worth running the math before that 6th activation. The current promotional offer on CoreMobile is 10 lines for $200/month ($20/line) — notably below the published $25 scale rate, with an additional $150 credit per line when switching.

SuperMobile includes access to T-Mobile’s Nationwide Network Slice — an industry-first feature that gives business data applications a dedicated fast lane on the 5G Advanced network, separate from general consumer traffic. In practice, this means mission-critical apps (VoIP calls, video conferencing, CRM tools, payment systems) can be configured to use the slice for more consistent performance during congested periods. We found this genuinely useful for businesses running customer-facing operations on mobile devices in high-density areas — a retail store on Black Friday, a mobile service team at a convention center. For a business where the phone is just for calls and email, it won’t be noticeable.

CoreMobile gives you 50GB of high-speed (premium) data per line per month before deprioritization — meaning after 50GB, your speeds may slow during network congestion. ProMobile sits in between. SuperMobile provides unlimited premium data with no deprioritization cap — T-Mobile does not reduce your speeds on SuperMobile regardless of how much you’ve used, as long as you’re on their network. For team members who stream video regularly, run large file uploads, or work in rural areas where congestion matters less, CoreMobile’s 50GB is often sufficient. For road warriors or field teams pulling large files in dense cities, the deprioritization on CoreMobile can be a real pain point.

The honest answer depends on your address and what you’re using it for. T-Mobile 5G Business Internet — a fixed wireless access (FWA) product using a 5G gateway — starts at $35/month bundled with a voice line and goes up to $70/month standalone. Setup takes about 15 minutes with no technician visit. We found it genuinely strong for small offices in 5G coverage areas: download speeds up to 400Mbps in good conditions, with median real-world speeds typically in the 100–250Mbps range. The downsides: speeds vary significantly by location and time of day, it’s not suitable for businesses needing static IPs or complex networking configurations, and rural coverage is spotty. As a primary connection for a 2–5 person office in a well-covered area, or as a reliable backup to a wired ISP, it’s compelling at $35–$50/month. For a larger office with constant video calls and large uploads, a wired fiber line with T-Mobile as backup is the safer setup.