Google Fi vs. Visible vs. US Mobile: which MVNO is worth it?

MVNOs — mobile virtual network operators — lease tower capacity from Verizon, AT&T, and T-Mobile and sell it at lower prices. The networks are identical; the savings come from leaner operations, fewer retail stores, and (sometimes) lower network priority. The three biggest contenders for serious users are Google Fi, Visible (owned by Verizon), and US Mobile.

We used all three as primary lines for at least 90 days each, ran network speed tests across three US cities, tested international roaming on five trips, ported numbers between them to measure switching friction, and called customer support 14 times across the three carriers. Here is what each one is actually good for — and where each falls short.

How we tested

Each MVNO ran as the primary SIM on an iPhone 16 Pro for 90+ days. We tracked median download and upload speeds at three locations per city — downtown business district at lunch, residential evening, and a high-density event venue during peak hours. International testing covered Mexico City, London, Tokyo, Berlin, and São Paulo.

Customer service testing: we deliberately created problems (unrecognized charge, lost-phone scenario, plan-change request, international travel question) and measured time-to-resolution. We also tested the activation experience by porting in numbers from both T-Mobile postpaid and AT&T prepaid.

We did not use referral bonuses or promotional pricing for the testing comparisons; all costs reflect the standard published rates as of June 2026.

Quick comparison

Google Fi Simply Unlimited

Google Fi is the most expensive of the three at $65/month for a single line. It is also the most useful if you regularly leave the country. The Simply Unlimited plan covers data and texting in over 200 countries automatically — no add-ons, no SIM swaps, no roaming days. Land at any major international airport and your phone connects to a local partner network within minutes.

The Fi catch is that international data is throttled to 256 kbps on the Simply Unlimited tier. That is enough for messaging, navigation, and basic web browsing, but not for streaming or large file uploads. The Pro tier ($85/month) lifts the cap to 50 GB at full international speeds; for a digital nomad or business traveler, the upgrade is worth it.

Domestically, Fi runs on T-Mobile's network with Google's smart network switching between T-Mobile and Wi-Fi calling. Coverage matches T-Mobile exactly — strong in cities and suburbs, weaker in rural areas. In our testing, peak-hour speeds in Chicago averaged 198 Mbps, Austin 215 Mbps, Seattle 167 Mbps.

Customer service is the best of the three MVNOs we tested. Fi support is staffed by Google and accessible via 24/7 chat in the app plus phone callbacks. Average time-to-resolution on our test issues was 11 minutes, the fastest in this comparison.

Best for: international travelers, people who already live in the Google ecosystem, families willing to pay for premium support, and anyone who wants the simplest single plan that covers domestic and international use.

Visible+

Visible+ at $45/month is owned by Verizon and runs on Verizon's network. The fundamental selling point: Verizon network reliability at less than half the postpaid price. Includes 50 GB of premium data, 10 GB of premium hotspot, data and calling in Canada and Mexico, and reduced deprioritization vs the base Visible plan.

Coverage is identical to Verizon postpaid because the towers are the same. In rural areas and mountainous regions where Verizon's LTE 700 MHz band reaches farther than T-Mobile, Visible+ is meaningfully better than Fi or T-Mobile-based MVNOs. In urban areas, the gap is smaller — T-Mobile mid-band 5G often beats Verizon's standard 5G in raw speed, though Verizon's 5G Ultra Wideband is faster where deployed.

Customer service is the worst of the three. Visible is online-only — no phone support, only in-app chat. Wait times for non-trivial issues averaged 38 minutes in our testing, and complex problems (number porting bugs, billing disputes) routinely required multiple sessions over several days. Average time-to-resolution: 4.2 hours.

Each Visible line is technically a separate account, which makes managing a multi-line family awkward. There is no consolidated billing or shared account management. For couples or families on a single carrier, this is a real friction point compared to US Mobile or postpaid carriers.

Best for: rural users who need Verizon's coverage at a non-postpaid price, single-line users who do not need much customer support, and budget-conscious users in areas where T-Mobile is weak.

US Mobile Unlimited Premium

US Mobile is the most interesting MVNO in 2026. Unlimited Premium is $44/month with 100 GB of premium data (more than double Fi or Visible), 50 GB of premium hotspot, and your choice of T-Mobile or Verizon network at signup. You can change networks later for a small fee. Multi-line family pricing drops to $25/line on four lines, the lowest in the industry.

The trade-offs: international calling is pay-as-you-go rather than included, the account interface is less polished than Visible or Fi, and you are responsible for managing your own SIM/eSIM swaps if you change networks. There are no premium streaming bundles.

Coverage flexibility is genuinely useful. We tested a four-line household where one line ran on Verizon (suburban area with patchy T-Mobile) and three lines ran on T-Mobile (downtown apartment with strong T-Mobile mid-band 5G). The cost was $100/month total for four lines on a single account. The equivalent T-Mobile or Verizon postpaid plan would have cost $180-220/month.

Customer service is solid. In-app chat plus optional phone support; our test issues resolved in an average of 24 minutes. The support staff actually answer technical questions about network performance and porting — not the generic "have you tried restarting your phone" responses we got repeatedly from Visible.

Best for: technically comfortable users who want maximum premium data at the lowest sustainable price, families who would benefit from network flexibility, anyone who has tried other MVNOs and run into the data-cap or network-priority issues.

Network priority and deprioritization

All three MVNOs sit at lower network priority than their parent carriers' postpaid customers. In congested areas during peak hours, postpaid customers get speeds first. The practical impact depends on where and when you use your phone.

In our testing in low-congestion areas (residential suburbs, smaller cities), deprioritization was invisible — MVNO speeds matched postpaid speeds within 5%. In high-congestion areas (downtown business districts at lunch, stadiums during events, major airports), MVNO speeds dropped 30-60% during peak hours.

Visible+ has the smallest deprioritization gap because Verizon prioritizes Visible+ customers above standard Visible but below Verizon postpaid. Google Fi and US Mobile sit at standard MVNO priority on their respective networks. If you frequently use mobile data in congested locations during peak hours, the deprioritization difference may matter; for most users, it does not.

Switching between MVNOs

Porting between MVNOs is faster than porting from postpaid carriers. We measured port times of 1-4 hours moving between Fi, Visible, and US Mobile. Porting in from T-Mobile postpaid or AT&T postpaid took 4-24 hours.

What you need: your current account number, account holder name, and billing zip code. For prepaid MVNOs you also need a port-out PIN (typically auto-generated and visible in your account settings). For postpaid carriers, you may need to call to generate the PIN.

The port-window risk: during the port, your old service goes inactive but the new SIM has not fully activated yet. Schedule the port during a time when you can afford to be without service for 1-2 hours, and keep both SIMs/eSIMs accessible until the port completes.

Which MVNO should you pick?

Pick Google Fi if international travel is part of your year. The price premium over Visible or US Mobile pays for itself the first time you skip buying a SIM at an airport. Pick Fi also if you want the best customer service of the three.

Pick Visible+ if you need Verizon's coverage specifically. Test the network at your address first — Verizon's coverage map is more reliable than T-Mobile's, but local terrain still creates dead zones. Skip Visible if you might also need international roaming or strong customer support.

Pick US Mobile if you want maximum value, network flexibility, and a multi-line family discount. Skip US Mobile if you need international roaming included or in-person retail support.

If you cannot decide, start with US Mobile. It is the cheapest, has the highest premium-data cap, lets you change networks if your first choice is weak, and offers month-to-month commitment with no contract. The downside (no included international, no streaming bundles) is the easiest to swap up from later if your needs change.