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Cannot Make or Receive Calls

Having trouble making or receiving calls on your Android or iPhone? This troubleshooting guide will help you quickly identify and resolve common calling problems, including dropped calls, call failures, or “not registered on network” errors. Follow these steps to restore calling functionality for all major carriers.

Common Symptoms

  • Unable to make or receive calls

  • Calls drop immediately or fail to connect

  • “Not registered on network” or “Call failed” error

  • Only emergency calls allowed

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Step by Step Troubleshooting

Android

  1. Check Signal Strength
    Move to an area with better coverage. Look for signal bars.

  2. Airplane Mode
    Ensure Airplane Mode is OFF.

  3. Check SIM Card
    Remove and reinsert SIM card.

  4. Account Status
    Ensure account is active and not suspended.

  5. Block List/Call Settings
    Check if numbers are blocked. Settings → Call Settings → Blocked numbers.

  6. Restart Device

  7. Try SIM in Another Device
    If works: Device issue. If not: SIM/network issue.

  8. Contact Carrier if unresolved.

iPhone

  1. Check Signal Strength
    Move to an area with better coverage. Check signal bars.

  2. Airplane Mode
    Ensure Airplane Mode is OFF.

  3. Check SIM Card
    Remove and reinsert SIM card.

  4. Account Status
    Settings → Cellular → Cellular Plans. Confirm plan is active.

  5. Blocked Contacts
    Settings → Phone → Blocked Contacts.

  6. Restart iPhone

  7. Try SIM in Another iPhone
    If works: Device issue. If not: SIM/network issue.

  8. Contact Carrier if unresolved.

Troubleshooting Flowchart (Text Outline)

  • Signal present?
    No → Move to area with coverage
    Yes ↓

  • Airplane Mode OFF?
    No → Turn OFF
    Yes ↓

  • SIM card inserted properly?
    No → Reinsert SIM
    Yes ↓

  • Account active?
    No → Reactivate account
    Yes ↓

  • Numbers blocked?
    Yes → Unblock
    No ↓

  • Restart device

  • Try SIM in another device
    Works → Device issue
    Doesn’t work → SIM/network issue

  • Contact carrier

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Pro Tips / Dealer Notes

  • Call failures after porting a number are often due to incomplete activation—verify with carrier.

  • If only one number can’t be called, check for call blocking or Do Not Disturb mode.

  • Weak signal or network congestion can cause intermittent call issues.

FAQs

Q: Why do my calls drop or fail to connect?

A: Causes include weak signal, blocked SIM, account suspension, or network congestion.


Q: Can a factory reset fix calling problems?

A: Only if the issue is software-related. Always check SIM, account, and carrier status first.

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