We are here to help you get answers to your questions about OneSimCard phones and services.
How do I recharge using 1SIM Fund?
How can I contact customer support?
There are a number of ways you can contact customer support.Is there a mobile app that will let me recharge my account and other services?
Yes! Our myOneSim app for the iPhone devices will let you easily access many account services, such as recharging your account, checking voicemail, ordering discount voice and text plans, and much more. MyOneSim is available for download from the App store. Find more information in the Help section of your online account.
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DataMax SIM cards can't be managed by myOneSim app at this time
How Do I Check The Balance Of Purchased Data Plan?
There are three ways to check the remaining balance of purchased data plan.
1. On-line in the Discount Section of the My SIM Cards menu of your web account or in the mini account at https://ma.onesimcard.com/Â
2. For eSIMs from the OneSim eSIM app
3. From OneSimCard mobile phone (for Universal, Expedition and eSIM World SIM cards only):Â
   Dial the following: *146*942#
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The remaining data balance will be displayed.
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:
From the phone using your credit card (Universal, Expedition and eSIM World only):
 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:
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.Â
I have an iPhone and am receiving charges for SMS sent to a UK mobile number 447786205094. Why?
This is a known issue with Apple's Facetime and iMessage applications on Apple iPhone devices. We recommend disabling Facetime and iMessage so it will not be able to automatically send SMS to this 447786205094 number. Any SMS sent to this number automatically by your phone can not be refunded by OneSimCard. Additional questions regarding iPhone applications and how they communicate should be directed to Apple Support.When making an outgoing call how do I select which way the call should go: through regular roaming or through OneSim VoIP?
To make an outgoing call using OneSim VoIP, you need to be registered on a Wi-Fi network and have the OneSim VoIP app running on your phone. You should make the call using the OneSim VoIP app dial pad. To make a call the regular roaming way,you should make a call from your regular phone dial pad.Â
NOTE: Regular roaming calling is NOT available on DataMax or DataMax eSIM cards. To use voice you will need to use the OneSim VoIP app
Can I use Facetime, WhatsApp, Telegram, Discord, iMessage, and other messaging Apps with eSIM?
For DataMax eSIM, you can use these Apps as you already do. Please ensure your messaging account is already setup with your primary carrier’s phone number because you cannot sign up for these services with the DataMax eSIM number.
Additionally, the eSIM data service can be used for the actual data part of your communications. So, when you are installing eSIM on phone, you can select the Primary service for Facetime and iMessage and then if your selected eSIM to be your primary data service, the communications will go over eSIM mobile data.
Do I need to have Data Roaming turned on for eSIM to work?
Yes. Data Roaming should be enabled on your phone for eSIM for data to work. Calls and texts on eSIM World should work with or without it.
How does eSIM works?
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