AppPage.net

Screenshots

  • 1SIM VoIP screenshot 1
  • 1SIM VoIP screenshot 2
  • 1SIM VoIP screenshot 3

About 1SIM VoIP

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.

Ratings & reviews

4.3

86 ratings

5 ★ 70% 4 ★ 13% 3 ★ 7% 2 ★ 3% 1 ★ 7%

What’s new

Version 3.1.3 · Updated September 29, 2026

- minor improvements

App privacy

The developer, Belmont Telecom, Inc., reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Contact Info: Phone Number

Used for: App Functionality

Alternatives to 1SIM VoIP

Looking for apps like 1SIM VoIP? Here are 6 similar apps on the App Store. The highest rated is ITS VoIP (5.0/5), and all 6 are free to download.

1SIM VoIP vs. alternatives
App Rating Price Last updated Compare
1SIM VoIP 4.3 / 5 (86 ratings) Free September 29, 2026
ITS VoIP 5.0 / 5 (5) Free Jun 9, 2025 Compare
805VoIP Softphone – Free Apr 27, 2026 Compare
Echo Mobile VoIP – Free Jun 19, 2025 Compare
Teo Mobile Softphone 4.4 / 5 (134) Free May 28, 2026 Compare
VentureTel SMS 5.0 / 5 (2) Free Mar 26, 2024 Compare
GoVoip 3.1 / 5 (39) Free Jul 29, 2026 Compare

Compare 1SIM VoIP with the top alternatives: ratings, updates, ASO score and keyword gaps →