Cox Mobile vs Ultra Mobile

By Rob Webber • Founder & Editor

Head-to-head comparison of plans, features, and pricing

Cox Mobile

Cox Mobile

Verizon network

$—/mo

0 plans available

Ultra Mobile

Ultra Mobile

T-Mobile network

$—/mo

0 plans available

Looking to switch carrier but not sure if Cox Mobile or Ultra Mobile is better? Within this guide, you'll be able to compare Cox Mobile and Ultra Mobile coverage, features, plans, and prices side-by-side, so you can decide which carrier offers the best deal.

Cox Mobile vs Ultra Mobile: Coverage & Plan Comparison 2026

  1. 1. Cox Mobile vs Ultra Mobile: Reviews
  2. 2. Cox Mobile vs Ultra Mobile: Plans
  3. 3. Cox Mobile vs Ultra Mobile: Coverage
  4. 4. Cox Mobile vs Ultra Mobile: Features
  5. 5. Our Verdict
  6. 6. FAQ

Cox Mobile vs Ultra Mobile: Reviews

Cox Mobile
Our Rating:
3.3/5
See Deals → View Plans

Pros

  • ✓ Verizon 5G & 4G LTE network coverage
  • ✓ Bundled savings for Cox Internet customers
  • ✓ No contract

Cons

  • ✗ Requires Cox Internet
  • ✗ Limited availability
  • ✗ Mixed customer service
Ultra Mobile
Our Rating:
3.4/5
See Deals → View Plans

Pros

  • ✓ T-Mobile 5G & 4G LTE network coverage
  • ✓ International calling included
  • ✓ Plans from $15/mo
  • ✓ eSIM compatible

Cons

  • ✗ Customer service reviews are mixed
  • ✗ Limited brand recognition
  • ✗ Fewer plan options than competitors

Cox Mobile vs Ultra Mobile: Plans

Cox Mobile Top Plan

Unlimited

$45/mo

Powered by Verizon

See at Cox Mobile →

Cox Mobile Plans

Ultra Mobile Top Plan

15GB

$39/mo

Powered by T-Mobile

See at Ultra Mobile →

Ultra Mobile Plans

Cox Mobile vs Ultra Mobile: Coverage

Cox Mobile

Cox Mobile is powered by Verizon 5G & 4G LTE wireless networks.

View Cox Mobile coverage map →

Ultra Mobile

Ultra Mobile is powered by T-Mobile 5G & 4G LTE wireless networks.

View Ultra Mobile coverage map →

Cox Mobile is powered by Verizon and Ultra Mobile is powered by T-Mobile. Coverage varies by location — check availability in your area.

Cox Mobile vs Ultra Mobile: Features

Feature Cox Mobile Ultra Mobile
Networks — —
Data Speed — —
3G Network — —
Mobile Hotspot — —
5G — —
VoLTE — —
WiFi Calling — —
Visual Voicemail — —
Bring Your Phone — —
Keep Your Number — —
Contract — —
Credit Check — —
Taxes Included — —
Multi-line Discounts — —
Multi-month Discounts — —
Money Back Guarantee — —
Customer Service — —
International Calls — —
International Roaming — —

Our Verdict

Cox Mobile is better for budget-conscious users who want plans starting at $0/mo on the Verizon network. Ultra Mobile is better if you want plans on the T-Mobile network starting at $0/mo. Both carriers offer the same tower coverage as Big Wireless at a fraction of the price.

Who Should Choose Cox Mobile

  • ✓ You want the Verizon network
  • ✓ Plans starting at $0/mo
  • ✓ 0 plan options to choose from
View Cox Mobile Plans →

Who Should Choose Ultra Mobile

  • ✓ You want the T-Mobile network
  • ✓ Plans starting at $0/mo
  • ✓ 0 plan options to choose from
View Ultra Mobile Plans →

Why You Can Trust This Comparison

I've spent years helping people ditch overpriced phone plans by exposing hidden fees and carrier tricks. At MoneySavingPro, we go beyond the fine print, testing and comparing real-world network performance so you don't have to.

I've personally tested Cox Mobile, Ultra Mobile, and other low-cost providers, comparing their speeds, coverage, and pricing to the Big 3. If there's a smarter way to save, you'll hear about it here first.

— Rob Webber, Founder & Editor

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Frequently Asked Questions

Is Cox Mobile or Ultra Mobile cheaper?
Cox Mobile is cheaper, with plans starting at $0/mo. Ultra Mobile starts at $0/mo.
Which network does Cox Mobile use?
Cox Mobile uses the Verizon network. You get the same coverage as Verizon customers at a lower price.
Which network does Ultra Mobile use?
Ultra Mobile uses the T-Mobile network. You get the same coverage as T-Mobile customers at a lower price.
Can I keep my phone number if I switch to Cox Mobile or Ultra Mobile?
Yes. Both carriers support number porting. You can transfer your existing phone number in about 10-30 minutes during the sign-up process.
Do Cox Mobile and Ultra Mobile offer 5G?
Most modern plans from both Cox Mobile and Ultra Mobile include 5G access at no extra cost where the network supports it.