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Limited time: 50 GB for $35/mo on 30-day rolling

FlexiFoneUSA
How it works

Set it up once, then leave it alone

FlexiFone behaves like any other data SIM. The only difference is that it has three networks behind it instead of one.

How it works

Four steps, then you can forget about it

No app to babysit and no settings to relearn. It behaves like a normal data SIM — it just has three networks behind it.

  1. 01

    Set up your SIM or eSIM

    Pick a plan and install it as a second data line on your phone, or drop the card into a tablet, hotspot or router.

  2. 02

    Turn on data switching

    Allow your device to use FlexiFone for mobile data when your primary line has nothing. One toggle in Settings.

  3. 03

    Let it find the signal

    In patchy areas your SIM moves between AT&T, T-Mobile and Verizon. You can also lock or block a network yourself.

  4. 04

    Travel without thinking

    Coverage follows you across the country, and roaming is included in 75+ destinations when you leave it.

Getting your SIM

eSIM or physical SIM

eSIM is instant and free. A physical card costs $5 and is the right answer for anything that isn't a recent phone.

Free

eSIM

Instant — scan a QR code and you're online.

Delivered by email in minutes

$5 delivery

Physical SIM

A triple-cut SIM card mailed to you.

2–4 business days by USPS

Compatibility

Which devices work best

Any unlocked LTE or 5G device will connect. How well it switches networks on its own is down to the device.

Works best

iPhone (XR and newer)

The most reliable automatic switching we've tested, plus clean dual-SIM handling so FlexiFone can sit alongside your main line as a data-only eSIM.

  • Automatic data switching between lines
  • eSIM install in about a minute
  • Manual network selection in Settings
Works well

Recent Pixel & Samsung Galaxy

Pixel 6 and newer, and Galaxy S21 and newer, handle multi-network selection well. Switching is a little slower to trigger than on iPhone.

  • eSIM supported on most models
  • Manual network selection available
  • Dual-SIM data routing varies by model
Physical SIM recommended

Hotspots, routers, tablets & IoT

Cellular gateways, mobile hotspots, RV routers, trail cameras and IoT modules all work. Most take a card rather than an eSIM.

  • Triple-cut SIM fits nano, micro and standard
  • No app or account needed on the device
  • Set the APN if your device asks for one

Things worth knowing first

  • Carrier-locked devices will not work — your device must be unlocked.
  • Some budget Android handsets handle network selection poorly and may need manual switching.
  • Automatic switching triggers on a total loss of signal, not on a slow connection. Full bars with no throughput needs a manual switch.
  • These are data-only SIMs: no phone number, no voice calls, no SMS, and nothing to port in or out.
From $4.92/mo

Try it on the network your carrier can't reach

Start on a 5 GB rolling plan for $10. If it doesn't fix your dead spots, cancel before the next 30 days and you're done.

Check coverage
  • eSIM delivered by email in minutes
  • Physical SIM $5, 2–4 business days
  • Cancel rolling plans anytime