Understanding SIM Swap Attacks
Attackers take over your phone number at the telecom level — bypassing your PIN entirely. Here's how.
A SIM swap attack gives a criminal complete control of your phone number — without ever touching your phone. Once they control your number, they can receive your bank OTPs, reset your email passwords, and empty your MoMo account. This guide explains exactly how they do it and how to stop them.
Understand how SIM swaps happen
The attacker calls your telecom provider pretending to be you. Using personal information they have gathered about you — your name, date of birth, Ghana Card number — they convince customer care to transfer your number to a new SIM card in their possession. Your phone immediately loses signal. They now receive all your calls and SMS.
Protect your personal information
SIM swap attackers need your personal data first. Never share your Ghana Card number, date of birth, or home address on social media or with unverified services. Be suspicious of forms, surveys, and calls that ask for this combination of details — it is likely data harvesting.
Set a SIM swap PIN with your provider
All major Ghanaian telecoms allow you to add a SIM swap protection PIN to your account. Visit your nearest service centre and request this. This means even if someone calls claiming to be you, customer care must verify your PIN before any SIM change is processed.
Watch for sudden loss of signal
The first sign of a SIM swap is your phone suddenly losing all network signal — no calls, no SMS, no data. If this happens and you cannot recover signal within a few minutes, call your provider immediately from another phone. Every minute matters.
Move your 2FA off SMS
SMS-based two-factor authentication is completely defeated by a SIM swap. Move your important accounts — email, banking apps, social media — to an authenticator app like Google Authenticator or Authy. These generate codes on your device itself, not via SMS.
Key Reminders
If your phone suddenly has no signal, do not wait — call your telecom immediately from another device.
Request a SIM swap lock at your telecom's service centre. It is free and takes under 10 minutes.
SMS OTPs are not safe. Use an authenticator app for anything important.
In this guide
- Understand how SIM swaps happen
- Protect your personal information
- Set a SIM swap PIN with your provider
- Watch for sudden loss of signal
- Move your 2FA off SMS
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