Unblock Contact Android !!exclusive!! -

Unblocking via the Contacts app must issue a ContentResolver.delete() on BlockedNumberContract.BlockedNumbers.CONTENT_URI and update the raw_contacts table. If either transaction fails (e.g., database lock), the contact appears unblocked in the UI but remains blocked by the telephony stack. 4. The Unblock Transaction: Atomicity Analysis Executing an unblock triggers the following sequence (Android 13+):

An unblock operation must explicitly call: unblock contact android

The SMS/MMS app maintains its own blocked table: content://sms/blocked . This table is not automatically synced with the BlockedNumberProvider on unblock. Google Messages and Samsung Messages use a periodic sync job (run every 6-12 hours). Therefore, unblocking a contact does not immediately unblock SMS delivery. Unblocking via the Contacts app must issue a ContentResolver

Between step 3 and step 5, an incoming call can still be rejected because the telephony stack's mBlockedNumbers cache hasn't been invalidated. Typical window: 50-150ms . 5. The "Ghost Block" Phenomenon A persistent issue in Android 12-14 is the Ghost Block — a contact appears unblocked, but SMS/MMS messages still fail to arrive. Therefore, unblocking a contact does not immediately unblock

// 2. Delete from legacy SMS block table (if using AOSP messaging) context.contentResolver.delete( Uri.parse("content://sms/blocked"), "address = ?", arrayOf(normalized) )

// Delete from telephony provider context.contentResolver.delete(BlockedNumbers.CONTENT_URI, ...) // Also delete from SMS provider context.contentResolver.delete(Uri.parse("content://sms/blocked"), ...) // Force sync via Carrier Messaging Client SmsManager.getDefault().clearBlockedNumberForSubscriber(subId, phoneNumber) Carrier Call Filtering: For RCS (Rich Communication Services) and VoLTE, carriers (T-Mobile, Verizon, Jio) maintain their own block list on the IMS core. When a user unblocks a contact on Android, the OS sends a CarrierConfigManager update via the TelephonyManager . However, if the carrier's network has a stale cache, the number remains blocked at the network level for up to 24 hours .