We are here to help you get answers to your questions about OneSimCard phones and services.
How do I know if USA, Canada or UK Mobile PEN I order is capable of receiving SMS?
To see if your PEN is capable of receiving SMS, please log in to your on-line account at www.OneSimCard.com. In the Recharge Menu next to the PEN you will see if it is SMS capable or not. You can also see there if this PEN could be used for VOIP or not.I just activated my SIM card and can't make a successful test call. What's wrong?
If you just activated your SIM card and can not make a test call by following the instructions in the user manual, you will likely just need to power off the phone and power it back on again. The phone should automatically re-register with one of our partner networks. Remember, if you answer the test call when it rings you will be charged for the call.What kind of payments do you accept?
We accept Visa, MasterCard, Discover, American Express and Bitcoin.
U.S. corporations can pay with company checks, ACH or wire transfer. No order will be processed until funds are cleared
For international customers with credit cards issued outside of the U.S. we require the order to be verified using the OneSimCard verification procedure. We do accept credit cards from most foreign countries.
Attention:Â Customers from the following countries must use Bitcoin option only (we will not accept credit cards as a form of payment): Congo, Egypt, Ghana, Lebanon, Nigeria, Pakistan, Palestine and Syria.
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To make it simpler, you can deposit money into your OneSimCard Money Fund and then use the funds to make all purchases at OneSimCard.com including airtime recharges.
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.How to estimate the amount of internet data usage on my device?
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General estimates for the amount of data used per service |
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Activity |
Data Usage |
Services |
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1 text only email with no attachment |
15KB |
6820 |
|
1 with attachment (attachments can vary greatly in size) |
300KB |
340 |
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Web Browsing |
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1 static page visit |
300KB |
340 |
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The estimate is just for viewing the page without |
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Social Media |
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1 social media post with photo |
350KB |
290 |
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1 Instagram picture upload |
150KB |
680 |
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1 WhatsApp text message |
5.5 KB |
18610 |
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Uploading and viewing pictures, playing videos, |
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Music |
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1 min of streaming music |
500KBÂ (30MB/hour) |
200 |
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Downloading a 3-min song |
3.7MB |
25 |
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Video |
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1 min of streaming video (standard) |
4MBÂ (240MB/hour) |
25 |
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1 min of streaming video (HD) |
15MBÂ (900MB/hour) |
6 |
Note:Â Data usage varies by device. The above examples are estimates only. The actual amount of data used for the described activity can vary.
Standard definition (SD) video streaming rate: 533KBPS
High Definition (HD) video streaming rate: 2000KBPS
1MB = 1,024KB
1GB = 1,024MB
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.Can I Pay with BitCoins?
Yes, You can pay with Bitcoins.
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When paying with Bitcoins you first deposit money into your 1SIM Money Fund. Once the money is there, you can make a purchase or set an automatic recharge of you SIM card(s) or Extra Number(s).
Follow these steps:
Is there an eSIM App for Apple iOS and Android devices?
Yes. The 1Sim eSIM app is available at:

Does voicemail work with OneSim VoIP?
Yes. If you are not available to answer the OneSim VoIP call or if the OneSim VoIP app is turned off, the call will be routed through our standard roaming network. If the call is not answered it will be sent to your OneSimCard voicemail box.Â
NOTE: Voicemail is not available for DataMax or DataMax eSIM cards with OneSim VoIP.
Can I pay with PayPal?
No. We no longer accept PayPal for individual accounts. PayPal is still available for payment on Corporate accounts though.© 2006-2026 Belmont Telecom Inc., DBA OneSimCard.com. All rights reserved