Forward Office Phone to Cell

Before dialing anything, find out which phone product you actually have. A provider like Verizon, AT&T, Comcast, Frontier, Optimum, Windstream, Astound, Spectrum, or Vonage often sells several different phone services, and the forwarding steps can differ between them. Check your bill, your account portal, or the paperwork from when service started.

As a general rule, traditional business landlines use star codes dialed from the desk phone. Hosted and cloud systems (like Vonage Business Communications or Spectrum Business Voice) usually manage forwarding in a web portal or app. Mobile lines use their own codes. Using the wrong product's instructions is the most common reason forwarding fails.

• Look for the product name on your bill or in your account settings.
• Check whether your phone is a physical desk line, a hosted/cloud line, or a mobile line.
• Note whether an administrator controls features; some business systems require an admin to enable forwarding first.

If your service uses star codes, dial the activation code from the office phone, then the 10-digit cell number, and wait for a confirmation tone or message. To turn forwarding off later, dial the matching deactivation code from the same line.

These are documented codes for specific products. They are not interchangeable, so match them to your exact service. For example: Verizon business landline uses *72 plus destination and *73 to disable. Verizon mobile uses *72 for all calls, *71 for unanswered, *73 to disable. AT&T Phone for Business uses *72/destination/# for all calls, *92 for no answer, *90 for busy, with *73#, *93#, and *91# to turn each off. AT&T Collaborate uses *72 for always, *62 for busy, *92 for no answer, with *73, *63, and *93 to disable. Comcast Managed Voice (Panasonic TPA65) uses *72/*73 for all calls, *92/*93 for no answer, and *90/*91 for busy. Optimum Business Phone uses *72 then destination, *73 to turn off. Frontier Unlimited Digital Voice uses *72, wait for the second dial tone, then destination, and *73 to disable. C Spire uses *72 plus destination, press Call, and *73 to disable.

• T-Mobile: **21*1 plus the 10-digit destination and # enables unconditional forwarding, ##21# disables; **61*1 for no reply, **62*1 for unreachable, **67*1 for busy, each disabled with ##61#, ##62#, or ##67#.
• Spectrum Business Voice: no star codes; sign in to SpectrumBusiness.net, open Voice, choose the number, then Voice Settings or Forwarding Manager, enable forwarding, and pick all calls or busy/no-answer.
• Vonage Business Communications: enable Call Forwarding and choose Forward Calls to a phone number in the account settings.
• Windstream OfficeSuite UC: use the WE Connect Dashboard's My Call Forwarding widget to set Immediate forwarding to another phone number, or set a ring count and a no-answer destination.
• Always confirm the product name first; codes for one AT&T, Comcast, or Frontier product do not work on that company's other services.

All-call (unconditional) forwarding sends every incoming call straight to your cell. The desk phone does not ring. This is simple, but it also means you cannot pick up at the office, and on some services it overrides voicemail on the original line.

Conditional forwarding only redirects calls in specific situations: when the line is busy, when nobody answers after a set number of rings, or when the phone is unreachable. This lets the desk phone ring normally during work hours while still catching calls you miss. Some systems let you set the ring count before forwarding; Windstream OfficeSuite UC, for example, lets you choose 1 to 20 rings for no-answer forwarding in its dashboard.

Pick all-call forwarding when you are away from the office for the whole day. Pick conditional forwarding when you want the desk phone to keep working but need a backup. Note that conditional codes are not verified for every carrier; if your provider's conditional forwarding is not documented, ask their support to confirm the exact code for your service rather than borrowing another carrier's.

• All-call: every call goes to the cell; the desk phone stays silent.
• No-answer: the desk rings first, then the cell gets the call.
• Busy: the cell gets calls while the desk line is in use.
• Unreachable: covers power or service outages on some mobile plans.
• All-call forwarding can override voicemail and hunt groups on some systems.

After activating, call your office number from a different phone (not the cell you forwarded to) and confirm it rings where you expect. Vonage specifically recommends verifying the destination with an outside call. If nothing happens, recheck the product name and the code, or contact your provider's support.

Remember to deactivate when you return to the office. Dial the disable code (usually *73 or the ## code that matches the feature) from the same line, or switch it off in the same portal where you enabled it. Leaving all-call forwarding on means you will keep missing calls at the desk without realizing it.

One important limit: Google Voice can forward calls to linked phone numbers, but Google states that forwarding calls from a Google Voice number to an automated answering system is unsupported. If your business number is a Google Voice number, forwarding it to an outside answering service is not a supported path.

• Test from a third phone so you can hear both ends.
• Watch for confirmation tones, beeps, or a portal status change.
• Deactivate with the matching off code when you are back.
• Google Voice numbers cannot be forwarded to automated answering systems.

Forwarding to a cell phone works well when you can answer. It does not help when you are already on a call, driving, or asleep. Missed forwarded calls go to your personal voicemail, where callers may hear a personal greeting and may not leave the details you need, like the service address or the best callback time.

If you want calls handled when you cannot pick up, an answering service is the alternative. AllDayDesk, this site's product, answers business calls around the clock using your saved business information. You keep your existing office number and forward calls to it; the setup starts by choosing your business or entering its website, checking the details, and hearing a personalized sample before you choose phone setup. Calls, transcripts, summaries, and bookings show up in your dashboard, and new appointments go on the built-in calendar once you have configured services and availability (an optional Google Calendar connection is available in Settings after you connect and authorize your account). When the caller's question, price, or appointment time is unknown, the assistant takes a message instead of guessing.

Compared with forwarding alone, an answering service adds something that responds when you cannot, and it records what callers said. Human virtual receptionist services exist too; for example, Ruby advertises plans starting at $245 per month as of October 9, 2026, and Smith.ai uses per-call pricing for its human receptionists, so compare current quotes and included allowances before deciding.

• Forwarding fails silently when you cannot answer; calls land in personal voicemail.
• An answering service handles calls you miss and records messages and summaries.
• You keep your existing number by forwarding calls; setup instructions depend on your phone service.
• Human receptionist services and AI services differ in cost, hours, and features; compare current quotes.