1SIM VoIP
1SIM VoIP is made and published by Belmont Telecom, Inc. AppBrain is an independent app data site and isn't affiliated with Belmont Telecom, Inc. The app name, icon, screenshots and description belong to Belmont Telecom, Inc. and are shown as published on the App Store.
AppBrain's verdict
Established- Rating on App Store
- 4.35
- 86 ratings
- Last updated
- September 29, 2026
It doesn't have enough ratings yet to judge what users think.
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Releases
Updates seen on the App Store- Version
- 3.1.3
- Launched
- March 2012
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 85.5 MB
- Content rating
- Everyone
Technologies used by 1SIM VoIP
About the app and developer
About 1SIM VoIP
1SIM VoIP is a productivity app developed by Belmont Telecom, Inc.
What is the rating of 1SIM VoIP?
1SIM VoIP is rated 4.35 out of 5 stars, based on 86 ratings.
Is 1SIM VoIP free?
1SIM VoIP is free. The app size is 85.52 MB. The latest version available is 3.1.3. The last update was on September 29, 2026.
What are the requirements for 1SIM VoIP?
The app has a content rating of Everyone. The app has been available on the App Store since March 2012.
Developer information for Belmont Telecom, Inc.
Address:
Store listing
By Belmont Telecom, Inc., from the App StoreDescription by Belmont Telecom, Inc. Written by the developer, not by AppBrain. Click to read.
The newer version 2 of the app adds the texting feature and allows the sending and receiving texts (SMS) to and from US and Canada mobile phones over Wi-Fi or mobile data at much lower rates than regular SMS sent and received over the roaming network.
The app does not require having a OneSimCard SIM installed in the phone, but it does require having a OneSimCard account and a VOIP and SMS enabled PEN.
Initial settings for the app are available in the “My SIM Cards” menu of the OneSimCard online account. When in the My SIM Cards menu, select the SIM (if there are more than one on your account) and then click on the Create VoIP Account link. This will create a OneSimCard VoIP account and provide you with a link with Settings information for your iPhone or iPad.
Important: Connection quality of the calls made using OneSim VoIP option over the Internet will only be as good as the quality of the Internet connection. Please be advised that in many cases this kind of connection quality is inferior to the connection quality made through the OneSimCard international SIM card roaming network.