Flex Mobile vs Optimum Mobile
By Rob Webber • Founder & Editor
Head-to-head comparison of plans, features, and pricing
Flex Mobile
T-Mobile network
$—/mo
0 plans available
Optimum Mobile
T-Mobile network
$—/mo
0 plans available
Feature Comparison
Feature Flex Mobile Optimum Mobile
Plans Side by Side
Flex Mobile Plans
Optimum Mobile Plans
Our Verdict
Flex Mobile is better for budget-conscious users who want plans starting at $0/mo on the T-Mobile network. Optimum 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 Flex Mobile
- ✓ You want the T-Mobile network
- ✓ Plans starting at $0/mo
- ✓ 0 plan options to choose from
Who Should Choose Optimum Mobile
- ✓ You want the T-Mobile network
- ✓ Plans starting at $0/mo
- ✓ 0 plan options to choose from
Frequently Asked Questions
Is Flex Mobile or Optimum Mobile cheaper?
Flex Mobile is cheaper, with plans starting at $0/mo. Optimum Mobile starts at $0/mo.
Which network does Flex Mobile use?
Flex Mobile uses the T-Mobile network. You get the same coverage as T-Mobile customers at a lower price.
Which network does Optimum Mobile use?
Optimum 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 Flex Mobile or Optimum 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 Flex Mobile and Optimum Mobile offer 5G?
Most modern plans from both Flex Mobile and Optimum Mobile include 5G access at no extra cost where the network supports it.