- Suspicious
Silent call report for 04 0355 2101 (0403552101). One contributor answered to hear only mumbling with no response from caller.
Silent Call Report for 04 0355 2101
One contributor has reported receiving a silent call from 04 0355 2101 (also written as 0403552101), an Optus mobile number. When the recipient answered, they heard only mumbling in the background but the caller made no attempt to communicate or respond.
Silent calls like this one from 0403552101 can indicate a few possibilities: the caller may have been testing whether the number is active, attempting to verify contact details for later targeting, or using an automated system that failed to connect properly. Silent calls are commonly associated with callback scams, where criminals collect active phone numbers and later contact them with fraudulent offers.
What to Do If You Receive a Call from 04 0355 2101
If 04 0355 2101 calls you:
- Do not: Return the call, as this may confirm your number is active and lead to more contact from scammers
- Do: Let it go to voicemail on future calls from this number
- Do: Block 0403552101 immediately in your phone's contact list
- Do: Hang up if the caller cannot explain their purpose or provide coherent information
- Do: Be suspicious if the caller is silent or heavily breathing without speaking
Report Patterns for 04 0355 2101
This is a single report of a silent call from an Optus mobile number. The call was answered, making this an active contact attempt rather than an automated ringback. While only one contributor has flagged 0403552101 so far, silent calls often occur in patterns before escalating to other contact tactics.
How to Report 04 0355 2101
If you receive further calls from 04 0355 2101 or suspect this number of scam activity, you can report it through several channels:
- ACMA (Australian Communications and Media Authority): Report unwanted calls at acma.gov.au
- Scamwatch: Report suspected scams at scamwatch.gov.au
- Reverseau: Contribute your own report to help other Australians identify this number
If the caller later contacts you with a specific scam offer or demand, report that interaction separately with as much detail as possible, including the time of call and what was said.
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WRITE A REVIEWFrequently Asked Questions
Why would someone call from 04 0355 2101 and stay silent?
Silent calls from 0403552101 are typically used by scammers to verify that your phone number is active and monitored. Once confirmed, they may later contact you with a fraudulent offer, impersonation, or investment scheme. Some automated systems also generate silent calls if they fail to connect to their target script or agent. Hanging up and blocking the number is your best defence.
Should I call back the number 04 0355 2101?
No. Do not return calls to 0403552101, especially after a silent call. Calling back confirms to the scammer that your number is active and monitored, making you a priority target for future contact. If the caller had a legitimate reason to reach you, they would have spoken or left a voicemail.
Is 04 0355 2101 definitely a scam?
Based on the single report for 0403552101, this appears to be a silent call with no legitimate purpose identified. While one report is limited data, the pattern of mumbling without communication is typical of automated scam dialling systems or callback verification tactics. Blocking the number is a safe precaution.
Can I block 04 0355 2101 on my phone?
Yes. Most Australian mobile phones allow you to block specific numbers. Open your phone's contacts, find the number 0403552101, and select 'Block' or 'Add to Blocked List'. This will prevent calls from 04 0355 2101 from reaching you in future. You can also report the number to your carrier (Optus in this case) for additional filtering.
What should I do if 04 0355 2101 calls multiple times?
If 0403552101 calls repeatedly with silence or mumbling, this strengthens the case for scam activity. Block the number immediately, do not answer or return calls, and report the pattern to ACMA at acma.gov.au. Keep a log of call times and dates to provide to authorities. Repeated silent calls indicate your number has been flagged in a scammer database.
Where can I report the silent call from 04 0355 2101?
Report this number to ACMA (acma.gov.au) for unwanted calls, or to Scamwatch (scamwatch.gov.au) if you suspect the silent call is part of a broader scam campaign. You can also contribute a report to Reverseau to help other Australians identify calls from 0403552101. The more reports logged, the clearer the pattern becomes for the community.