Where Does FRITZ!App Fon Store Accounts?
FRITZ!App Fon keeps SIP accounts and call state in private Android storage tied to your FRITZ!Box use.
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AVM FRITZ!App Fon turns the phone into a landline handset over Box WiFi. SIP accounts, selected numbers and call state sit in private storage under the avm package. The Box holds the authoritative phonebook and number mapping. Local data matters for quick dial and recent calls. It cannot replace the Box config.
iOS builds exist separately; this post covers the verified Android ID. The Box phonebook itself stays on the router. Keep the Box password ready before wiping the old phone. Re run setup against the same Box after reinstall. Clearing the folder while calls run drops the session.
Where FRITZ!App Fon stores this, by platform
/data/data/de.avm.android.fritzapp
Private SIP accounts and call state for the verified AVM package. Box password plus number selection re creates the binding after reinstall.
Frequently asked questions
How do I move FRITZ!App Fon to a new phone?
Re run setup against the same FRITZ!Box with its password and pick the landline number again. Accounts bind to box plus device. A folder copy never transfers SIP credentials.
How do I fix stale FRITZ!App contacts?
Clear cache from system settings for stale phonebooks. Full storage clear drops SIP accounts and call history. The Box phonebook itself stays on the router.
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