- Suspicious
One contributor reports a suspicious call from 0420 904 348 (0420904348) asking about SIM activation. Possible account compromise attempt.
Suspicious SIM Activation Inquiry on 0420 904 348
A contributor has reported receiving a call from 0420 904 348 (also written as 0420904348) asking about who activated their SIM card. The caller's line of questioning raised red flags for the recipient, suggesting possible unauthorised access to their Vodafone account or an attempt to gather information for account takeover.
This type of inquiry is unusual and potentially concerning. Legitimate Vodafone representatives typically have access to account details and would not need to ask customers who activated their SIM. The fact that someone calling from 0420904348 is asking this question suggests either a social engineering attempt or potential account compromise.
What the Caller Asked
The contributor reported that the caller from 0420 904 348 specifically asked about who activated their SIM. This is a direct targeting question aimed at understanding account activity, which could be used to:
- Verify if the account holder is aware of recent changes
- Identify if there are unauthorised SIM activations
- Gather information to support a fraudulent account takeover attempt
No additional context was provided about how the caller identified themselves or what they claimed to represent, but the nature of the question itself is what prompted the report to Reverseau.
Why This Matters
SIM-related fraud is a serious concern because control of your SIM card can lead to:
- Interception of two-factor authentication codes for banking and email
- Unauthorised access to your myGov account and tax information
- Takeover of messaging services and social media accounts
- Identity theft using your phone number
If someone has already activated a SIM in your name on 0420 904 348's number or is attempting to do so, this requires immediate action.
What to Do If You Receive a Call from 0420 904 348
If 0420 904 348 calls you asking about your SIM activation:
- Do not: Confirm any account details, SIM information, or device details over the phone
- Do not: Return the call to any number the caller provides
- Do: Hang up immediately and contact Vodafone directly using the official number on your bill or their website
- Do: Check your Vodafone account online for any unauthorised SIM activations or recent changes
- Do: Verify if anyone has recently activated a new SIM under your account or phone number
Vodafone staff will have full access to your account and will never need to ask you who activated your SIM. If they have security concerns about your account, they will tell you directly and provide you with safe ways to verify your identity.
Checking Your Vodafone Account
Log into your Vodafone account immediately to review:
- Recent account activity and login history
- Any new SIM cards or devices added to your account
- Changes to contact details, billing address, or service authorisations
- Any active plans or services you don't recognise
If you find unauthorised activity linked to 0420904348 or any other number, contact Vodafone's fraud team straight away.
How to Report 0420 904 348
This suspicious inquiry should be reported through multiple channels:
- Vodafone directly: Contact Vodafone on 133 633 to report the suspicious call and request a security review of your account
- ACMA (Australian Communications and Media Authority): Report the call at acma.gov.au
- Scamwatch: File a report at scamwatch.gov.au if you believe this is part of a larger fraud attempt
- Reverseau: Help other Vodafone customers by adding your report here so we can track patterns of suspicious SIM-related calls
If you believe your SIM has been compromised or an unauthorised SIM was activated, also consider reporting to the Australian Cyber Security Centre at cyber.gov.au.
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Asking about who activated my SIM, something fishy going on
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WRITE A REVIEWFrequently Asked Questions
Why would someone call asking who activated my SIM?
This is a classic social engineering tactic used in SIM takeover attempts. Scammers call to establish whether you're aware of recent account changes. If they've already activated a fraudulent SIM under your name, they're testing whether you've noticed. If they haven't yet, they're gathering information to support their next move. Legitimate Vodafone staff have direct access to all SIM activation records and would never ask customers this question. If 0420 904 348 called you with this question, treat it as a serious warning sign.
Is 0420 904 348 calling from a Vodafone number?
0420 904 348 (0420904348) is registered as a Vodafone mobile number, which makes the call more suspicious, not less. Scammers often use legitimate mobile networks or spoofed numbers to appear credible. Never assume a call is legitimate just because it comes from a Vodafone number. Always verify by hanging up and calling Vodafone directly on the number from your bill or their official website.
What should I do if 0420 904 348 already knows details about my account?
If the caller from 0420 904 348 knew specific details like your name, address, or account number, your information may have been compromised in a data breach. This increases the risk of fraud. Immediately contact Vodafone on 133 633 to flag the call, review your account for unauthorised activity, and request enhanced security measures. Also check your credit report and consider setting up alerts for your email and banking services.
Can a scammer activate a new SIM using my phone number?
Yes, this is possible if they have enough personal information about you. Once they control a SIM on your phone number, they can intercept two-factor authentication codes sent to your phone, potentially gaining access to your email, banking, and myGov account. This is why the call from 0420 904 348 asking about SIM activation is so concerning. Check your Vodafone account immediately for any SIMs or devices you don't recognise.
What's the difference between a legitimate Vodafone security call and a scam?
Vodafone will never call asking 'who activated your SIM' as a security question. If Vodafone detects suspicious activity on your account, they will either send you a secure message through the My Vodafone app or advise you to call 133 633 directly. They won't ask you to confirm account details over an incoming call. The call from 0420 904 348 doesn't follow Vodafone's legitimate security procedures, which is why the contributor flagged it as suspicious.
Should I block 0420 904 348?
Yes, you should block 0420 904 348 (0420904348) on your phone immediately to prevent further contact. However, blocking alone doesn't solve the underlying problem if your account details are already compromised. First block the number, then contact Vodafone on 133 633 to review your account security, check for unauthorised SIM activations, and consider changing your account PIN and security questions.