You don't have to uninstall to take a break from Hiya Spam Blocker. Depending on what you want to stop, here are your options — all reversible.
Pause call screening for a while
If you have Call Screener enabled and just want calls to come through normally for a bit, you can snooze screening or turn off Screen my calls. See how to use Call Screener on Android or iPhone.
Calls are going to voicemail or not reaching you
If calls are not reaching you, you may need to deactivate Call Screener.
Open Hiya Spam Blocker → Settings and tap Deactivate (Android: under Call Screening & Visual Voicemail; iPhone: Deactivate Call Screener) — this removes call forwarding from your carrier line.
Still not receiving your calls? See Call forwarding and accessing voicemails for more details and troubleshooting steps.
Too many calls are marked as spam
Adjust your blocking settings:
Android: in the Hiya Spam Blocker app, open Premium → Spam Blocking and turn off the categories you don't want blocked.
iPhone: in the Hiya Spam Blocker app, open Blocking and turn off the categories you don't want blocked.
Turn off caller ID and blocking entirely
Android: in your phone's Settings → Apps → Default apps, change your default phone app (and Caller ID & spam app) back to your phone's built-in app.
iPhone: in Settings → Phone → Call Blocking & Identification, turn off all Hiya switches.
Your account and block list stay intact. To remove the app completely, see How to uninstall Hiya Spam Blocker.