How to Set Up Call Forwarding on Any Phone to Protect Your Parent

Call forwarding for elderly parent protection is the single most reliable mechanism behind every real screening solution, including HAPS — because it works at the carrier level, on any phone, without installing anything. Once set up, every call to your parent's number gets redirected somewhere else automatically, with no ongoing effort required from them. This guide covers the standard forwarding codes that work across nearly every carrier, plus the settings-menu path for iPhone and Android.

Universal Forwarding Codes

Most US and international carriers support standard GSM feature codes you can dial directly from the phone, no app required. These work the same way regardless of whether the phone is an iPhone, an Android, or an older basic phone:

What it does	Code to dial
Forward all calls	**21*[number]#
Forward when busy	**67*[number]#
Forward when unanswered	**61*[number]#
Forward when phone is off/unreachable	**62*[number]#
Cancel all forwarding	##002#
Cancel "forward all" only	##21#

Replace [number] with the full destination number, including country code (for example, **21*+14155551234#), then press the call button. A confirmation message or tone usually appears within a few seconds.

iPhone: Settings Menu Method

1. Open Settings and tap Phone.
2. Tap Call Forwarding.
3. Toggle it on, then enter the destination number.

Note: this menu only appears on iPhone if the carrier supports it directly — some carriers (including some prepaid and MVNO plans) require using the dial codes above instead, since the setting isn't exposed through iOS in every case.

Android: Phone App Method

1. Open the Phone app.
2. Tap the three-dot menu, then Settings.
3. Tap Calls, then Call forwarding.
4. Choose a forwarding condition and enter the destination number.

The exact menu wording varies slightly by phone manufacturer, but the path is consistently under the Phone app's own settings on nearly every Android device.

Carrier-Specific Notes

• Verizon: supports both the dial codes above and a toggle in the My Verizon app under Devices → Manage → Call Forwarding.
• AT&T: dial codes work directly; AT&T Call Protect (a separate free spam-filtering feature) can run alongside forwarding.
• T-Mobile: dial codes work directly; T-Mobile also offers Scam Shield as a separate, complementary filtering layer.

The Part Most Guides Skip: What to Forward To

Here's the detail that determines whether call forwarding actually protects your parent, or just moves the same problem to a different phone: forwarding all calls to your own cell number means every single call — including the ones from trusted family, doctors, and the pharmacy — now rings you instead of them. That's disruptive for you and confusing for callers who expect to reach your parent directly.

What actually works is forwarding to a service that screens first and only routes the calls that need your attention: your parent's trusted contacts still ring through to them directly, and only unrecognized numbers get forwarded to you. That's exactly what HAPS provides — a dedicated number to forward to that handles the screening logic automatically, so "call forwarding" becomes "call protection" instead of just call redirection.

Common Mistakes That Undo the Setup

• Forgetting the country code. A destination number entered without +1 (in the US) will often fail silently — the code appears to work, but forwarding never actually activates. Always include the full international format.
• Using "forward when unanswered" instead of "forward all." This still lets your parent's phone ring first for every caller, including unknown numbers — the opposite of what you want. For real screening, unknown callers should never ring your parent's phone at all.
• A software update resetting carrier settings. Occasionally a major OS or carrier profile update clears forwarding settings. It's worth re-checking a parent's forwarding status every few months, especially after they mention getting a "phone update" notification.
• Forwarding to a number that's sometimes off or unreachable. If the destination phone is off or out of signal, most carriers fall back to letting the original phone ring instead — which defeats the purpose if that's exactly when you needed the call intercepted.

Removing Forwarding Later

If you ever need to undo it, dialing ##002# cancels every type of forwarding at once and returns the line to normal — useful to know if you're switching services or need to temporarily restore direct calling.