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Last updated on: 2026-05-27
App Store Apps > Productivity > 1SIM VoIP
1SIM VoIP icon

1SIM VoIP

3.1.2
Belmont Telecom, Inc.
4.31
81 reviews
Free

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About 1SIM VoIP

1SIM VoIP is an overall app developed by Belmont Telecom, Inc..

Download Statistics

User Ratings

1SIM VoIP is rated 4.31 out of 5 stars. The rating is based on 81 ratings.

App Information

1SIM VoIP is FREE to download. The APK download size is 85.23 MB. The latest version available is 3.1.2. The last update was on May 14, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play March 2012.

Description
OneSim VoIP provides OneSimCard customers with an even less expensive way to make and receive international calls on their iPhone mobile phones or iPads. To use OneSim VoIP, users must have a good quality Wi-Fi, 3G, 4G or LTE Internet connection and a VoIP-enabled Personal Extra Number (PEN) activated with OneSimCard. When making an outgoing call, OneSimCard users can select the way the call will be made – either through the OneSimCard international SIM card or OneSimCard VoIP network. Calls made over the VoIP network are generally much less expensive than OneSimCard’s standard international roaming rates. Incoming calls made to the PEN will be received through low-cost VoIP if the OneSimCard phone and OneSim VoIP app are registered on the Internet. Otherwise, the call will be sent the usual way to the phone through the international SIM card.

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.
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More data about 1SIM VoIP

Price Free to download
Rating 4.31 based on 81 ratings
Ranking Not ranked
Version 3.1.2
App download size 85.2 MB
Suitable for Everyone

Changelog of 1SIM VoIP

No changelog data

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Developer information for Belmont Telecom, Inc.

Belmont Telecom, Inc.

N/A

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App Store Rankings for 1SIM VoIP

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Technologies used by 1SIM VoIP

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Telnet Client Terminal icon Telnet Client Terminal
Skylar icon Skylar
Voipcom Mobile icon Voipcom Mobile
VIP Call icon VIP Call

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