Smartphone unable to make calls
4.5
Outgoing calls fail immediately or show "Call Ended" without ringing.
Symptoms
- Call failed message
- No dial tone
- Instant hang up
Possible Causes
- Insufficient balance
- Fixed Dialing Numbers (FDN) active
- Radio interference
Step-by-Step Fix
1
Check Account Balance
Ensure your prepaid or postpaid account is active.
2
Disable FDN
Go to Call Settings > Supplementary Services > FDN.
3
Toggle VoLTE
Try disabling or enabling VoLTE to see if it affects call stability.
When to See a Technician
Call failures are often related to the carrier's IMS registration status.
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