What's the cheapest way to get unlimited data on a phone plan?

Short answer: Visible at $25/month (taxes included, on Verizon's network) and US Mobile's Unlimited Starter at $25/month are the cheapest solid month-to-month unlimited plans. If you can pay a year upfront, Mint Mobile's unlimited plan works out to about $15/month. The big three carriers charge $65–$95 for a comparable single line.

"Unlimited" is doing heavy lifting in phone-plan marketing, so let's be precise about what the cheap plans actually give you — and where they cut corners — before you switch.

What "unlimited" really means on cheap plans

Every unlimited plan has fine print. The budget versions — from Visible, Mint, US Mobile, Metro, Cricket, and the other MVNOs — give you unlimited data in the sense that it never stops and you never pay overages. But most throttle or deprioritize you after a certain amount of high-speed usage, slow your hotspot, or limit video streaming quality.

Deprioritization is the key concept. Budget carriers lease network access from Verizon, AT&T, or T-Mobile, and during congestion, the network owner's own customers get priority. In practice, most users rarely notice — modern networks have plenty of capacity most of the time. But at a packed stadium or during rush hour in a dense city, your speeds may dip while a postpaid customer's don't.

The practical question: how much data do you actually use? Most smartphone users consume well under 20GB a month. If that's you, the limitations of a cheap unlimited plan will almost never bind. If you're hotspotting a laptop all day or streaming 4K video on cellular constantly, read the hotspot and video terms carefully.

The $25 tier: Visible and US Mobile

Visible, which is owned by Verizon, offers its base unlimited plan at $25/month with taxes and fees included — the price you see is the price you pay. You get unlimited data on Verizon's network, unlimited talk and text, and unlimited hotspot (at reduced speeds). For a single line with no contract, it's the benchmark cheap unlimited plan.

US Mobile's Unlimited Starter, also $25/month with taxes included, is notable for letting you choose your underlying network — Verizon, T-Mobile, or AT&T towers — and switch between them. That flexibility is genuinely useful if you move or if coverage varies where you live and work.

Several other carriers cluster at $25 for new customers or with autopay: Metro by T-Mobile, Boost Mobile, Straight Talk, and Total Wireless all have $25 unlimited offerings with various conditions. The differences between them are mostly about network, hotspot allowances, and whether taxes are included — compare those three things and pick the network that covers you best.

One detail that separates the decent $25 plans from the frustrating ones: the deprioritization threshold. Some plans slow your data after 20–35GB of use in congested conditions; others give you a bigger high-priority allowance. If you're a moderate user on Wi-Fi most of the day, you'll never hit these limits. But if the phone is your primary internet — no home broadband, heavy commuting streaming — favor the plans with higher thresholds, even if they cost a few dollars more. The cheapest plan that doesn't work for your usage isn't cheap.

The prepay-a-year tier: down to $15

If you can pay twelve months upfront, prices drop further. Mint Mobile's unlimited plan works out to about $15/month effective on an annual prepayment (T-Mobile's network). US Mobile's annual unlimited plan lands around $22.50/month effective, and Visible's annual option around $23/month.

The trade-off is commitment. You're locking in for a year to get the rate. If your needs change — you move somewhere with poor T-Mobile coverage, say — you're stuck or you eat the prepayment. For most people with stable lives and a carrier they've already tested, it's the cheapest legitimate way to get unlimited data in the US.

One tip: try the carrier month-to-month for one billing cycle before committing to the annual plan. Most of these carriers offer a cheap trial or a single month at the higher rate. A year of bad coverage isn't a bargain at any price.

What the big carriers charge and why

AT&T, Verizon, and T-Mobile charge roughly $65–$95/month for a single unlimited line, plus taxes and fees that can add another $5–$10. What does the extra $40–$70 buy? Priority data (less deprioritization), larger hotspot allowances, international roaming perks, streaming subscriptions bundled in, and in-store support.

For some people that's worth it — heavy travelers who need international roaming, people who hotspot as their home internet, families who value walking into a store for help. But for a single line where you mostly use Wi-Fi at home and work, the premium buys a lot of features you may never touch. The typical savings switching from a big-carrier plan to a $25 MVNO plan is $600+ a year per line.

Do the honest audit before deciding. Pull up your last few bills and check two numbers: how much cellular data you actually used, and what you're paying per line after taxes and fees. Most people discover they're paying for far more plan than they use — the carrier's default recommendation is always more generous (and more expensive) than necessary. If your usage fits comfortably inside a budget plan's limits, the premium tier is pure margin for the carrier.

Family and multi-line plans: the real savings

Everything above was for a single line, but families change the math dramatically. Multi-line discounts are where cheap carriers get genuinely aggressive: four lines on Metro, Cricket, or Total Wireless often run $100–$120/month total — $25–$30 per line — for unlimited data. Compare that to $65–$95 per line on the big three, where four lines can approach $300/month with taxes.

The savings compound because the per-line discount stacks with the already-low base rate. A family of four switching from big-carrier postpaid to a budget multi-line plan can save $2,000+ a year — enough to cover the phones themselves.

The logistics are straightforward: everyone keeps their number, ports take anywhere from minutes to a day, and most budget carriers support eSIM now, so there's no waiting for SIM cards in the mail. The main thing to coordinate is timing — port all lines together to avoid a prorated mess on the old carrier's final bill, and don't cancel the old service until the port completes.

How to pick the right cheap plan

Start with coverage, not price. A $15 plan on a network with dead zones where you live is worse than no plan at all. Ask neighbors what works, check coverage maps (with appropriate skepticism — they're marketing), and use a trial if offered.

Next, check the three things that actually differ: hotspot allowance (matters if you tether), video streaming quality (some cap at 480p), and whether taxes and fees are included (a $25 plan plus $6 in fees is a $31 plan). These details matter more than brand.

Then consider how you buy. Bring your own phone — buying a phone from the carrier on installments wipes out the plan savings fast. A mid-range phone bought outright and kept for three or four years costs a fraction of the flagship-on-installments treadmill, and every budget carrier supports bring-your-own-device. And use autopay where it earns a discount, but watch for carriers that require it for the advertised price — the headline rate should be the rate you actually pay, not a conditional one.

The catches to watch for

A few gotchas show up repeatedly. Promotional pricing that jumps after a few months — always check what the rate becomes, not just the intro offer. "Unlimited" plans with very low deprioritization thresholds that slow you down after 20–35GB. Hotspot caps as low as 5GB on some cheap plans. And customer service that exists only via chat, which is fine until it isn't.

None of these are dealbreakers if you know about them upfront. They only become problems when someone switches expecting big-carrier service at a quarter of the price and discovers the corners that were cut.

The porting process itself deserves a mention. Keep your old line active until the number transfer completes — canceling first can strand your number. Ports usually finish within hours but can take up to a day; don't switch the morning of an important trip. And screenshot or save your account number and port-out PIN from the old carrier before you start, because you'll need both and the old carrier's app has a way of logging you out at the worst moment.

The cheapest way to get unlimited data is to stop paying for the carrier's brand and start paying for the network underneath it. Visible at $25/month or Mint at $15/month effective will cover the vast majority of users on the same towers the expensive plans use. Check your coverage, read the hotspot terms, bring your own phone — and keep the $600 a year. Your future self, looking at a noticeably smaller phone bill every single month, will thank you.