FREQUENTLY ASKED QUESTIONS

We are here to help you get answers to your questions about OneSimCard phones and services.

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101. How To Use Questions
    • How to activate and set up the mobile data service on your mobile device or tablet?

      1. Log in to your account at www.onesimcard.com using the email address and password you entered during the activation or registration of the SIM.
      2. To enable data, go to your My SIM Cards menu, select your SIM card, scroll down to Internet Data and click ‘Enable’.
      2a. For DataMax SIM cards, you can disable Pay-As-You-Go (PAYG)/Per MB data on your online account in the "My SIM Cards" menu. You will see " in the "Select SIM Card" section an area labeled "Use w/o Plan:" to disable per MB data use, this should be turned off. It is recommended to use data plans whenever/wherever available.
      3. Turn on Data Roaming on your phone.
      This is all that is needed for mobile data to work.



102. Troubleshooting Questions
    • When I send an SMS text message I am sometimes charged for multiple outgoing text messages, what's wrong?

      This means that your SMS text message has been split up into multiple messages because it contains too many characters.

      Each standard GSM format SMS text message can be a maximum of 160 characters. If you send a text in a foreign language or that contains any unsupported characters, the text will be sent in Unicode format with a maximum character length of 70. If your text exceeds these character limits then it will automatically be split up and sent as multiple messages and your account will be charged accordingly for each outgoing SMS text message.
103. How To Use Questions
    • How do I check my OneSimCard balance?

      For Universal, Expedition, & eSIM World ONLY: Just dial 099 "Send" from your OneSimCard phone and in few minutes the balance will be displayed on the screen of your phone. Customers with iPhones can use OneSimCard Assist app to check balances and many other things.

      You can always check your current balance by logging onto your OneSimCard account at www.onesimcard.com.

104. How To Use Questions
    • How can I add airtime to my OneSimCard service?

      In order to add airtime instantly, simply register a credit card with us on our website.

      There are several ways to add airtime to your OneSimCard service.
      Automatic Recharge - recommended:

      1. Just log on to your account at www.onesimcard.com and set auto-recharge in the Recharge Menu. Funds will be added to your account when your balance drops below the threshold you set.

      From the phone using your credit card (Universal, Expedition and eSIM World only):

      1. a) From the phone dial pad dial 098YYYY*XX. Talk. YYYY = Last 4 digits of the credit card used last at OneSimCard.com. YY = Amount from 25 to 99 USD


       For example, if you need to add $50 and the last 4 digits of the credit card registered with us is  8654:
      You would dial 0988654*50 and press TALK. In few seconds you will get a confirmation message with  your new balance.
      * is a star character located on the keypad
      From the phone using 1SIM Fund:
       a) From the phone dialpad dial 098YYYY*XX. Talk. YYYY -  4 digits PIN you created in 1SIM FUND menu. YY Amount from 25 to 99 USD

       For example, if you need to add $50 and the 1SIM FUND PIN is  8654:
      You would dial 0988654*50 and press TALK. In few seconds you will get a confirmation message with  your new balance.
      * is a star character located on the keypad

      From the OneSimCard.com web interface:

      1. You must log in at www.onesimcard.com each time you wish to add funds.
      2. The minimum recharge amount is US $25.00
      3. Using Recharge PIN purchased from a dealer:

      If you purchased a recharge PIN from OneSimCard Authorized dealer, you can recharge your account from OneSimCard handset from OneSimCard - Add Credit menu. When the Add Credit menu is selected, enter the 10-digit PIN and press the Talk (Send) button. 

105. Ordering Questions
    • How many times can I install an eSIM, and can it be installed on different devices?

      For DataMax eSIM can be installed once.
      For eSIM World purchased after Jan 1st, 2024, after the initial installation, the eSIM can be reinstalled up to 9 times. This eSIM can NOT be installed in any other device. This eSIM can only be reinstalled in the original device. In no circumstances can the eSIM be installed more than 10 times (the initial installation plus 9 subsequent installations).
      For eSIM Asiania this eSIM can only be installed 1 time. It cannot be reinstalled after the initial installation.
      In no circumstances can the eSIM be installed more than 4 times (the initial installation plus 3 subsequent installations).
106. OneSim VoIP
    • Where can I find the settings required to be entered into the OneSim VoIP app?

      Once you create the OneSim VoIP account, you will be emailed settings and instructions. You can also see the settings in the My SIM Cards menu of your online account.
107. eSIM
    • Is there an eSIM App for Apple iOS and Android devices?

      Yes. The 1Sim eSIM app is available at:

      Get it on Google Play



      These apps allow for much easier management of eSIM data plans.

      To connect your eSIM app to your existing web account at www.onesimcard.com, please complete the following simple steps:

      1. Install eSIM app

      2. Log in to the eSIM app using email and password for your current online OneSimCard account

      That is all. You will be able to see the device connected to your web account in the MY SIM Cards menu of your account at www.OneSimCard.com

      Customers who ordered an eSIM directly from the eSIM app do not need to connect the app and their online account at OneSimCard.com as they are already connected.


108. Troubleshooting Questions
    • Can I move balances from one SIM card to another?

      We allow moving balances from one SIM card to another in the following cases:

      • Corporate Accounts - anytime.
      • Individual Accounts - only when a SIM card is lost or stolen. The remaining balance from your lost or stolen SIM card and PEN(s) if any can be transferred to another SIM card on your account.
109. eSIM
    • How do I top up my data with eSIM?

      There are two ways you can do this:

      1. For eSIM World you can use the 1SIM eSIM app.
      2. From your mobile go to ma.onesimcard.com. This provides the access to your free  OneSimCard mini account. Free means that there is no need to have the SIM balance or data package on the SIM to be able to access this page in over 110 countries. Log in to your account and activate a new data package.

        2. From any computer log in to your on-line account at OneSimCard.com to order a data package. 

      Simply go onto your web account or eSIM app and purchase a new data package appropriate to your travel needs.

110. Ordering Questions
    • Can I pay with PayPal?

      No. We no longer accept PayPal for individual accounts. PayPal is still available for payment on Corporate accounts though.

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