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To make a Samsung phone behave as if it is busy, use Call forwarding > Forward when busy to redirect calls when you are already on a call. If you want your phone to stay quiet, use Do not disturb; to stop calls from particular numbers, block them. Forwarding is carrier-dependent and does not guarantee callers will hear a literal busy tone.
Choose what callers should experience
| Method | Caller outcome | Scope | Carrier dependence | Exceptions and reversal |
|---|---|---|---|---|
| Forward when busy | Incoming calls are redirected to a number you choose while your line is busy. | Busy-only. | Carrier support or activation may be required; confirm with your carrier. | Turn off or change the forwarding setting in Call forwarding. |
| Do not disturb | Your phone locally mutes calls and notifications; it does not necessarily give callers a busy signal. | Calls and alerts, subject to your settings. | Device setting. | You can allow exceptions such as selected contacts, favorites, or repeated callers, and switch the mode off or adjust its schedule. |
| Block numbers | Blocked calls do not appear as normal incoming-call notifications; they may still be recorded in the call log. | Selected numbers, or unknown/private callers if you enable that option. | Device setting. | Remove a number from the blocked list or turn off unknown/private blocking in Block numbers. |
Forward calls when you are already on another call
Samsung’s Gulf support guide describes call forwarding as redirecting incoming calls to another number when your phone is busy, unreachable, or unanswered: Samsung Gulf: Set up call forwarding on a Samsung Galaxy. The exact menu names vary by model, region, carrier, and One UI version.
Set up Forward when busy
- Open the Phone app and tap the three-dot menu or More options.
- Open Settings. Depending on your phone, tap Call settings or Supplementary services.
- Tap Call forwarding. If prompted, choose Voice calls.
- Select Forward when busy, enter the destination number, and save or enable the setting.
Samsung’s Saudi support guide documents the path Phone > More options > Settings > Supplementary services > Call forwarding > Voice calls, while other Galaxy menus may show Call settings instead: Samsung Saudi Arabia: Set up call forwarding on a Samsung Galaxy.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsCheck the destination number carefully. If the setting is missing, fails to activate, or does not redirect calls, ask your carrier whether call forwarding is enabled for your account and SIM, and whether any restrictions apply. A forwarding setting redirects calls; whether callers hear a busy tone before or instead of redirection depends on the carrier and network behavior.
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- How it Works: SPAM identified calls are instantly blocked automatically. Preferred Calls Ring through like normal with Caller ID displayed. Your phones connected to the TEL port Won't Ring on Blocked Calls. Create your own Invited or Allowed Family (White List) and block All other callers. Use the Dual Block Buttons to Block a NAME or NUMBER Displayed. Remote Block a Call when Dialing * 2 # through your telephone handset.
- The Patented ProSeries 3 Call Blocker from Digitone is an Easy Installation and is Simple to Use. No need to rush over and tap a red button when the ProSeries has already blocked a known unwanted SPAM, Out of Area, Private, Anonymous, 800 Service, ROBO?, Dashes, "Quotes" or V123+ call. Use Call History to select Any Caller to Block by (Double Tap) Name or Number. Block any NAME like: Unavailable, Unknown, SCAM RISK, City + State, Potential Scam, Wireless Caller. Block ANY call without answering, as they call in with either RED button.
- Feel confident that the ProSeries already Blocks Millions of Known Unwanted Numbers and Fake Names. No need to change your existing phones or service. Works with Any Analog Corded, Cordless Phone or Fax System on any telephone service. Large Back-Lighted Display. Got questions? Call the number on the front screen of the ProSeries 3.
- Works with all USA phone companies: AT&T, Cox, Spectrum, CenturyLink, Cable Modems, DSL, FIOS, or Digital Services from VoIP Telcos like [V] from Verizon, Ooma Telo, Ooma Basic, Vonage, Magic Jack etc. Also, works in Mexico, Canada, Brazil, European Union (ETSI), Australia, Singapore and others with North American standardized phone lines.
- Allow any blocked caller to ring through like normal with the Green Invite Button. Double Tap the Green Button to add VIP callers shown in Call History. Note: Caller ID Name and Number Service from your phone company is required for this model to work automatically.
Other forwarding choices
Samsung also lists Always Forward, Forward When Unreachable, and Forward When Unanswered. These are distinct from busy-only forwarding: choose the condition that matches when you want calls redirected, and verify availability with your carrier.
Silence calls without turning the phone off
Use Do not disturb if you want calls muted on the phone rather than forwarded. Open Settings > Notifications > Do not disturb, then enable it or create a schedule. Samsung lets you configure exceptions, including selected contacts, favorites, or repeated callers. Review those allowances if a call still rings: an exception may let it through. See Samsung Support: Use Do not disturb mode on your Galaxy phone.
Rank #2
- [ IMPORTANT NOTE 1 ] This product is a call blocker only and does not have a telephone or answering machine function. No phone or answering machine is included in the package. Before purchasing, please make sure that your telephone line has Caller ID service and that it is an ANALOG line. the ENF860 requires Caller ID service from your telephone line provider to work and is for analog lines only ! No mains power required, just plug in the phone line to use
- [ IMPORTANT NOTE 2 ] In BLOCK mode, there will STILL BE some new variant numbers bypassing the database making the phone ring, you NEED to manually set up to block them OR switch to FAMILY mode to let only the numbers in FAMILY LIST through. Please refer to the manual for the CORRECT SETTINGS.
- Dual mode;In BLOCK mode you can block callers by Numbers and Names; In FAMILY mode all callers outside the FAMILY LIST are blocked;The two modes can be switched at any time as needed and NO data will be lost after switching modes.
- Preloaded with a large number of spam numbers that have been the subject of repeated complaints ; Users can also manually add 4000+ numbers to the NUMBER LIST to build their own database ; Add 256 NAMES to block calls by name.
- Blocks INTERNATIONAL, PRIVATE/WITHHELD, and Out of Area numbers by default; users can SET to block the entire area code or changing numbers starting with a fixed number, such as 00, 800, 855, 999, 7324, 33626, 134567, etc.
Do not disturb changes what you hear and see on your device; it does not itself tell the caller that your line is busy. Set exceptions and schedules to suit whether you want to silence everyone, only certain callers, or calls at particular times.
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Block a number from Recents
- Open Phone > Recents.
- Tap the information button beside the number, then tap Block.
Add a number or block unknown callers
- Open Phone, tap More options, then Settings > Block numbers.
- Add the number you want to block, or enable the option for unknown or private numbers if your phone provides it.
Blocked calls may still appear in the call log, but they do not generate normal incoming-call notifications. Menu labels and available options can differ by device and software version. Samsung’s instructions are at Samsung Support: Block phone numbers on your Galaxy phone and Samsung Support: Block unknown numbers on your Galaxy phone.
Rank #3
- This is the latest version Telephone Call Blocker with hidden or unavailable call numbers can be blocked. And there is no fees to use it; Please keep the manual for future use.
- Block up to 4000 individual phone numbers, including incoming and outgoing calls , prefixes and up to 10 digit area codes.
- One-touch to Block: Locate a number and then press Block to add it to the blacklist.Better set the call blocker in series ( one end of it connected to your phone and another end to the PSTN telephone line); Though it can also be set up parallel, but not compatible with some phone systems.
- Permanent storage of the numbers in the blacklist even power is off or telephone line is plugged out.
- Battery free: It is line powered, no need battery. And it works with almost all single line telephones. If you find some numbers are blocked but you never mean to, then press Block and check your blacklist, then delete those numbers which like area codes or prefix numbers.
If calls still come through or forwarding does not work
- For Do not disturb: Confirm it is enabled at the time of the call, and check whether the caller is an allowed exception.
- For blocking: Check Phone > More options > Settings > Block numbers and verify the number or unknown-caller setting is on.
- For forwarding: Recheck the selected condition and destination number. Confirm with your carrier that forwarding is supported and active for your account and SIM.
- For calls generally: Make sure Airplane mode is off and the phone has network service; check that the SIM and account are active, and install available software updates.
Samsung cautions that call settings and screen layouts vary by model and software version. If a setting is absent or behaves differently from the steps above, check Samsung’s support instructions for your region and device, then ask your carrier about network-dependent call forwarding: Samsung Support: Troubleshoot phone call issues.
Quick Recap
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Rank #4
- Robocall Blocker - connect to landline cordless phones to block robocalls, unknown International, 00 prefix and other callers; ideal for phones without call Block or limited registration capability
- Blocks total 16, 000 telemarketer numbers - includes pre-programmed database of 14, 000 robocaller and telemarketer numbers; can add 2, 000 more manually; when an unknown call comes in, press the red button to block and register the number
- Build your own database - store up to 100 numbers of friends, family and others; when a trusted number calls, a green LED blinks on the unit, therefore you can answer the phone with peace of mind; when unknown call, The LED blinks red
- Bilingual talking Caller ID – Announce Name or the number of callers, hear who's calling — friend or unknown —from across the room with convenient talking Caller ID Announcements in English or Spanish
- Minimal footprint design - fits neatly beside your cordless phone; large red call Block button is easy to push; a bright white, easy-read Backlit LCD clearly shows Caller names or numbers
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