Verify
Where the code lands, service by service
Twenty-one services, one page each: what that company publishes about number type, how you add or change the number, when it asks again, and what it takes to get back in if the number is gone. Written for accounts you already hold — a company's own, or your own after you leave the country — not for opening a second one.
Every page below is built from the service's own help pages, quoted and linked. Where a company publishes nothing about number type, the page says so instead of filling the gap. The mechanism behind all of it — how a service decides your number is an internet line and silently drops the code — is in what makes a number non-VoIP, and what each service publishes collects the rules that actually exist.
Verify · checked September 2026
Getting Stripe's two-step code on a number the business keeps
Stripe publishes no rule about VoIP or virtual numbers anywhere in its two-step authentication help. What it does publish: it re-asks for the code periodically, changing the number needs a challenge on the old one, and losing it means a recovery request judged on whether you can prove you own the account.
Read →Verify · checked September 2026
The QuickBooks number problem: changing it turns two-step verification off
Intuit publishes no VoIP rule. It publishes two things that matter more: updating the phone number on an Intuit Account automatically turns two-step verification off, and if you no longer hold the old number, getting it changed means a proof-of-identity form with a driver's licence, passport or notarised document attached.
Read →Verify · checked September 2026
Shopify's two-step code belongs to a person, not to your store
Shopify publishes no VoIP or landline rule. It does publish something merchants keep getting wrong: two-step authentication is tied to a staff member's individual Shopify ID, and the store owner cannot view or change their phone number. It also lets one account hold several backup numbers.
Read →Verify · checked September 2026
Etsy asks again every 30 days, so the number has to keep working
Etsy publishes a landline refusal, requires a code on a new browser or device and again every 30 days, and binds the two-factor number to the shop's verified mobile number so the two move together. It is also the one service here that says a single number may verify several accounts you own.
Read →Verify · checked September 2026
Walmart Seller Center asks for a code every single time you log in
Walmart publishes no rule about number type, but it does publish a country restriction and the strictest cadence in this section: a one-time code on every login, with no trusted-device option. Two-step verification is set up per user, and five failed attempts lock the account for 24 hours.
Read →Verify · checked September 2026
AWS asks you to use a company phone number, and explains why
AWS verifies a phone number when you open an account and keeps it as the primary contact. Its own documentation tells businesses to use a corporate number and warns that an individual's number makes the account hard to recover. SMS is no longer an MFA option at AWS at all.
Read →Verify · checked September 2026
GitHub's SMS codes: the country list, and the recovery you must set up first
GitHub says nothing about VoIP numbers but does publish the list of countries where it can deliver SMS at all. It no longer supports a fallback SMS number, an organisation can block SMS 2FA outright, and GitHub Support will not restore access to an account whose factors are lost.
Read →Verify · checked September 2026
OpenAI refuses VoIP and Google Voice, and never lets you change the number
OpenAI is one of the few companies that publishes an explicit number-type rule: landlines, VoIP, Google Voice and premium numbers are refused, and verification runs over SMS only. It also caps a number at three verifications for life and offers no way to change the number on an account afterwards.
Read →Verify · checked September 2026
GoDaddy names Google Voice as unusable for verification codes
GoDaddy publishes a short, specific refusal: a telephone service like Google Voice cannot be used for SMS verification. It also ranks SMS its weakest factor, locks a method for 24 hours after too many code requests, and needs the old factor before you can rotate to a new number.
Read →Verify · checked September 2026
Google tells you not to use Google Voice for Google's own codes
Google publishes no rule about third-party VoIP numbers, but it warns twice against using Google Voice for its own verification and recovery, tells Workspace admins that text messages are discouraged, and makes a newly changed number wait about a week before it can authorise sensitive actions.
Read →Verify · checked September 2026
Meta has two phone checks, and only one of them belongs to the business
New Meta advertisers may have to verify a phone number before publishing ads, and Marketing API advertisers must. That check belongs to the business. Two-factor authentication on a business portfolio is a different thing: Meta requires each person to set it up on their personal Facebook profile.
Read →Verify · checked September 2026
TikTok's codes are rare, which is exactly why losing the number hurts
TikTok Ads Manager lets you mark a device as authorised so the code is asked for rarely. The flip side is documented plainly: changing the number requires a code on the old number first, and if you lose access TikTok's help tells you to contact a regional client service team. There is no self-service path.
Read →Verify · checked September 2026
LinkedIn accepts landlines and refuses VoIP, and says so in writing
LinkedIn publishes an explicit number-type rule: cell and landline phones are supported, VoIP numbers are not. It also requires one account per person in their real name, which decides who a business-owned line is honestly for — the individual holding it, not a team sharing a login.
Read →Verify · checked September 2026
WhatsApp asks for an active SIM, and writes it down
WhatsApp's registration help says you need an active SIM card in your phone that can receive SMS or phone calls, and lists VoIP among the number types that can't be registered. Changing the number on an existing account is a different and much better-supported move, and it only works while the old number still answers.
Read →Verify · checked September 2026
Instagram's code goes to the number the account confirmed
Instagram requires a confirmed phone number before SMS two-factor can be switched on, and says the number you enter becomes the account's confirmed number. Changing it later issues a fresh set of backup codes. Instagram publishes nothing about VoIP or virtual numbers, and recommends an authentication app over text messages.
Read →Verify · checked September 2026
A Facebook profile belongs to one person, and so does its number
Facebook publishes three two-factor methods — a security key, an authenticator app and text message codes — plus ten one-time recovery codes. It says profiles are for individual use only, which settles who the number under one should belong to, and it publishes nothing at all about VoIP or virtual numbers.
Read →Verify · checked September 2026
Changing your Google number changes less than you expect
Google says a newly added number may take about a week before it can verify sensitive actions, and that changing the number on your account only affects some Google services. It also says there is no phone line to call for help signing in, which makes backup codes and a second method the part worth doing first.
Read →Verify · checked September 2026
On Telegram, whoever has the number has the account
Telegram publishes that accounts can only be connected to a mobile number, that each number is a separate account, and that the number is the only way it identifies a user. A rented line can be that number, but only if you treat losing the line as losing the account — which is why Telegram's own two-step password matters more here than anywhere else in this section.
Read →Verify · checked September 2026
Amazon's way back in is an identity check, not a phone call
Amazon offers two-step verification by text message or authenticator app, and asks for a passcode at any sign-in that looks unfamiliar. It publishes nothing about VoIP or virtual numbers for retail accounts. When the number on file stops working, the route back runs through Amazon's own account-recovery flow rather than a support line that can simply switch it off.
Read →Verify · checked September 2026
Apple suggests a trusted number that isn't inside your iPhone
Apple requires at least one trusted phone number for two-factor authentication and advises adding a second one that isn't tied to your iPhone, because a lost or damaged phone otherwise takes both your device and your number with it. Recovery without either takes days, and Apple says its support cannot speed that up.
Read →Verify · checked September 2026
OpenAI says ChatGPT doesn't require a phone number
OpenAI's help centre states that phone verification is no longer required for creating an account or using ChatGPT, and that it is required on the developer platform for a first API key. Where a number is used, OpenAI refuses VoIP and Google Voice, caps a number at three verifications for life, and never allows the number on an account to be changed.
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