12 reviews
Content rating
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About this app

**For Google Fi users with made-for-Fi phones only!**

This is a stand-alone, drop-in dialer replacement app that is the fastest and easiest way to utilize dialer codes to switch networks for Google Fi users! A stripped-down, straightforward way to switch between cell phone carriers, do a SIM switch, and more! As your phone’s default dialer, Fialer will perform all of the necessary Google Fi actions yet you can continue to use your preferred dialer for incoming and outgoing phone calls.

Fialer also allows for executing dialer codes in the background! With our integrations, your favorite apps have more control over to which network you're connected and when dialer codes are run. Want your phone to be on one carrier at work but a different one at home? Want to schedule a time for the debug code to run? All this is now possible with our integrations!

🏠Home Screen
- Google Fi users can manually switch between networks with one touch from the Home screen
- eSIM / SIM switching
- No root or Accessibility necessary!

📲Dialer Codes
- Descriptions of the function and purpose of each dialer code

- Email us with any questions you have or let us know any trouble you’re experiencing
- Link to our support page with different articles for all you need to know about Fialer
- Go through a short tour as an introduction to the main features of Fialer

- Signal Spy [look for Fialer (Signal Spy Edition)]
- Tasker
- Automate
- FiSwitch (coming soon!)

☎️Android Q compatible
- Follows your phone’s light/dark theme

**For Google Fi users with made-for-Fi phones only!**
Updated on
Mar 6, 2020

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
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Ratings and reviews

12 reviews
Daniel Dalton
August 24, 2020
It's set as my default dialer, but the stock phone keeps getting switched back as default. The network switching works great. Unless I'm using it wrong, it seems that it acts as sort of a hub for the regular dialer. To make a call from Fialer, you touch the keypad icon, which then brings up the stock dialer. Update: still not working. Fialer won't stay the default dialer. Nearly every time I open it, I have to reset it as default. Support was friendly, but unable to help.
2 people found this review helpful
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July 8, 2020
Hi, Daniel - sorry you're having trouble with the app! Please email us at because I have some follow-up questions and some info that might be helpful. Thanks!
J. Mancine
July 23, 2021
This app is great, but no longer works after a recent update to the Google Phone app. When calls come in, the phone rings/vibrates but there is no dialer screen or notification with which to answer. And opening the phone app fails so there is no way to dial out. Hopefully this can get an update!
5 people found this review helpful
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A Google user
March 30, 2020
Great app, seamlessly switches from FI sim to physical Sim and back again as needed. Also switches the FI mobile carriers either permanently or on algorithm. Also allows for repairs, updates. Also can put out a report based on your network.
3 people found this review helpful
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July 8, 2020
Thank you very much for the 5 stars! If you ever need help, please email us directly at

What's new

- Introductory tutorial to the basics of Fialer
- Tasker integration
- Automate integration
- Icon to see to which network you're connected
- European users can now switch to Three
- Misc bug fixes and updates