KnowRoaming is a US SIM carrier that provides free US phone number with 0 monthly fees for SMS verification, reasonably-priced data plans, and calling.

Knowroaming global sim card with an assortment of plans for use in Asia, Europe, and elsewhere. KnowRoaming’s global service works in 200+ countries and destinations.

Knowroaming global sim card

How to get KnowRoaming Global SIM Card with a $0/month basically?

If you just need a reliable Unite States number to receive SMS verification, you can buy a Knowroaming global SIM with a pay-as-you-go plan. KnowRoaming Global SIM Card is a $0/month basically, no needed to purchase credit and data plan. It is assumed that you don’t use the services (Calls, SMS, and Data), you haven’t added credits. Receiving text messages is free even if you’re traveling abroad.

How to keep the free US number of Knowroaming?

US phone number of KnowRoaming will remain active without any additional top-ups. The only time that they will cancel the US phone number is if there is no activity for 15 months. So if you wish to continue your US phone number, you may just simply log into your KnowRoaming APP, and this will trigger and show that you are still using your account.

KnowRoaming gives you three SIM card options: a traditional physical one, a SIM card “sticker,” and an eSIM code that you scan. Physical KnowRoaming SIM card and KnowRoaming sticker are $9.99 USD.

Which apps can be verified with the Knworoaming US Phone number?

Proven apps

  • Google: Gmail、YouTube;
  • Vedio:Zynn, Vigo Video, Kwai, Likee, Yalla, Badoo, Netflix ;
  • Pay: Paypal, Shopify, Wish, eBay, Coinbase, Uber, Alibaba Cloud, Netflix, Coinbase, Yalla, Amazon, Kwai, Zynn
  • social: TikTok, WhatsApp, Telegram, Snapchat, Wechat Out, Discard, Viber, Bumble, Facebook, Twitter, Instagram, Line, Apple ID, Yahoo, Snapchat, Potato chat, Parler, Discard, Bumble, Badoo, Payment Link, WhaleEx

Can Knowroaming use to verify Google Voice?

Knowroaming US phone number can’t be used to verify Google Voice.  Because Knowroaming US number is a virtual phone number.

 How to buy KnowRoaming Global SIM Card?

Your phone must be unlocked from your carrier before buying KnowRoaming SIM card.
KnowRoaming Global SIM Card
KnowRoaming gives you three SIM options:

  • A traditional physical one
  • A SIM “sticker” that goes over your home SIM and automatically detects your foreign location
  • A scannable SIM code for eSIM-ready phones like the Google Pixel 3 and newer iPhone models

The physical card can be bought from online stores, for example, Amazon.

Knowroaming activation and get free us phone number

Knowroaming will assign a US phone number when you create a Knowroaming account and activate your SIM card.

1. Insert the KnowRoaming Global SIM Card

Insert the KnowRoaming Global SIM Card into your phone or apply the KnowRoaming SIM Sticker.

insert the Global SIM Card

2. Download Knowroaming APP

Download the KnowRoaming app via Google Play or the App Store on the phone.

3. Register account

Register your account using the KnowRoaming App (For Windows Mobile and Android Tablet users go to our web app at

  • Open KnowRoaming app
  • The welcome interface appears, click “Continue” to enter the login and registration page
  • On the login page, click “Sign Up”
  • Manually scratch off the gray cover on the back of the SIM card, and the “Serial Number” (SN) will appear.
  • Enter “Serial Number” and click “Continue”
  • Enter your name, email address, and password. This part is used to register a KnowRoaming account and log in to the KnowRoaming app.
  • Home Country: Click to select United States (+1) (United States)
  • Check “I agree…”
  • Click “Continue”
  • Click “Confirm Details”

How To Load Credit To Your Account?

KnowRoaming is a pre-paid service. If you arrive abroad and switch onto the KnowRoaming network with no funds in your account, your service will not work except receiving the text messages.

KnowRoaming top up
Go into the KnowRoaming App > Select Load Account > Load Balance > Select Amount and Load Now

  • Load credit is not a must if you just need to receive verification codes.
  • If you need to use the KnowRoaming number to make calls, receive calls, surf the Internet, or send text messages, you need to recharge before you can use these services.

In the KnowRoaming App, you can monitor your balance and your usage

How do I Purchase and Activate a Data Plan?

    1. Tap the ‘My Plans’ on the main page of the app, then select ‘Shop Plans’ from the menu. Once you select the desired plan, you will receive a prompt confirming the purchase
    2. Activating Data Plan

KnowRoaming date plan
Tap ‘My Plans’ view your available plan(s) from the home screen, then select ‘Activate’ next to your desired plan to start it – otherwise, it will remain there on standby, waiting for you to Activate it.

Buy multiple US phone numbers in the secKnowRoaming APP

In the KnowRoaming APP, you can purchase multiple US phone numbers, that is, one card with multiple numbers. Purchasing a new number requires paying a new fee.

Generally, we do not use it for SMS verification. Because the purchased new number does not support receiving text messages, but can only make calls, receive calls, and receive voice messages.KnowRoaming multiple US phone numbers

KnowRoaming App Voicemail

KnowRoaming also has a voice message function. When you do not receive a call, you can check whether there is a message for you in the APP.

KnowRoaming Voicemail

How to make an outgoing call?

When making an outgoing call, be sure to always use the international format: +(country code)(phone number)

This means if you want to call a UK number you would dial: +44 XXXX XXXXXX

Where +44 is the country code and the X’s represent the digits of the phone number. This method of dialing is still used if you’re roaming in the UK and trying to call someone in the UK.

Using KnowRoaming send messages

When sending a message, be sure to always use the international format: +(country code)(phone number)

KnowRoaming FAQs

Q1: Is KnowRoaming Global SIM Card a $0/month basically, no needed to purchase credit and data plan?

A1: Any unused credits and packages will expire after 9 months from purchase. You can still use your SIM and the assigned number even after the credits and packages expire. You will only have to add credits should you wish to use the services (Calls, SMS, and Data).

Q2: Should I need to add credit every 9 months to keep the free US number?

A2: Not necessarily, the account will remain active even after 9 months without any additional top-ups. The only time that we will cancel any account is if there is no activity for 15 months.

However, should you wish to continue your service after that time period, you may just simply log into your KnowRoaming APP, and this will trigger and show us that you are still using your account. This can be done even if you’re not traveling abroad.

These measures are in place because otherwise, we have no way to tell if someone has stopped using an account, so it will allow us to better service our current customers if we can weed out those accounts that are not being used.

Q3: How long do SIM accounts last?

A3: Accounts that have been inactive for 15 months (no activity on the account) will be expired. You will be notified by email twice that their account is going to expire soon. One email reminder will occur after 14 months of inactivity, and the final reminder will occur after 14 months and 2 weeks of inactivity. You can simply log into the app to reset the clock, or connect your phone to the network (no usage needed). You can either log in to the app or connect the SIM to a network to reset the clock.

Q4: Can I receive an SMS verification code by using this phone number?

A4: Shortcode SMS is not supported. Shortcode SMS such as verification codes from banks or websites/apps you register to will not be delivered as this is not being sent from real mobile numbers.

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