Do I need a SIM card to use the Heyo app for calling?

Do I need a SIM card to use the Heyo app for calling?

⚡Quick answer

Yes. The same physical SIM card that is registered with your Heyo account must be inserted in the phone, have an active calling balance/plan, and sit alongside a basic internet connection to start (mask) the call. No SIM = no outbound or inbound Heyo calls.



1. Why is a SIM card required?

Heyo masks your caller-ID with a virtual business number, but the actual voice call uses your phone’s native cellular network—and that demands:

• A physical SIM card in the device running Heyo.

• An active calling balance or plan on that SIM.



2. Three non-negotiable requirements

  1. Active calling plan/balance
  2. SIM inserted in the same device
  3. Basic internet connection

Tip: If both Wi-Fi and mobile data are on, Heyo auto-switches for the best call quality.



3. What happens if any requirement is missing?

• No SIM in device: Outbound and inbound calls fail; Heyo desktop site cannot make calls.

• Zero balance / expired plan: Call dial fails even though the Heyo plan is active.

• No internet at call initiation: You’ll see “Heyo is offline”, and the call won’t start.

• Account suspended: Heyo blocks all calls.



4. Troubleshooting checklist

  1. Internet OK? Open a web page or run a speed test.
  2. SIM balance OK? Check your carrier app or USSD code.
  3. Heyo balance OK? Open Heyo Dashboard → Balance.
  4. Account active? Settings → Account Status.
  5. Restart Heyo app and re-try. Still stuck? Send us a chat (see Support). 


5. Support options

In-app chat  →  Settings ▸ Help & Support 
Daily demo    →  Mon-Fri, 2 PM IST

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