---
title: "1SIM VoIP - Reviews, Revenue and Downloads in United States | Apple App Store"
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 qua"
---

# 1SIM VoIP — United States

![1SIM VoIP App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/af/1d/08/af1d0815-0014-95dc-2e90-7e67b1660a9c/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Belmont Telecom](https://apptail.io/developer/belmont-telecom-Yep)
**Category:** Productivity
**Rating:** 4.3/5 (81 ratings)
**Price:** Free
**Bundle ID:** com.onesimcard.onesimvoip
**Store:** Apple App Store
**Country:** United States
**Version:** 3.1.2 (released 2026-05-14)
**Original Release:** 2012-03-28
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id510371587)
**AppTail Page:** [https://apptail.io/app/1sim-voip-NeV/united-states](https://apptail.io/app/1sim-voip-NeV/united-states)

## 1SIM VoIP 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.

## 1SIM VoIP Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/d6/28/7f/d6287f21-629a-df78-1e09-0b37b19300f3/pr_source.png/640x960.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/2f/54/3f/2f543f46-914f-0d5c-2e27-4fe70eca16ad/pr_source.png/640x960.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/0c/5f/e0/0c5fe0c8-7bfc-b508-23ca-d3b2afb19905/pr_source.png/640x960.png)

## 1SIM VoIP Rating Breakdown in United States
- 5 stars: 55 (68%)
- 4 stars: 11 (14%)
- 3 stars: 6 (7%)
- 2 stars: 3 (4%)
- 1 stars: 6 (7%)

## 1SIM VoIP Reviews in United States

### ***** "Great app. Saves money"
Have been using it for long time
-- Bill1594, 2024-10-14

### ***** "Great app"
The updated SIM VOIP app works well.
-- Oldham5, 2024-07-18

### ***** "Big improvements"
This app was horrible and barely worked about a year ago. I recently tried it again and it has been working great for texting and calling. Considering cancelling my other service after I test it some more and make sure it’s reliable.
-- WillBeDeadAndGone, 2024-05-05

### *---- "Horrible"
It doesn’t work. System is unintuitive and poorly designed. Good luck getting tech support or customer service. There’s nothing like being in a foreign country and not being able to verify your card.
-- Gimlet88, 2023-11-08

### *---- "Full of bugs"
Poorly designed app shows the wrong names on text and calls does not link properly with Contacts release prematurely should have been tested before pushing it to the App Store. Been a customer for three years not compatible load banks as they claim if you need a real number for verification we need one tie to your Social Security number with a real eSIM provider
-- jrecho, 2023-10-26

### ****- "Works as stated but 1 problem…"
The problem I am having with this app is when menus say Press 1 for …. When I press 1 it is not recognized by the answering system. Pressing 2 or 3 seems to work but on several outgoing calls the 1 prompt doesn’t work. App developers, can you fix this? Thank you.
-- EXP Rob, 2023-10-12

### *---- "Truly terrible support"
I had a problem not reciving SMS on the APP, everything else was OK. I contacted them via the website and they did not pick up, they told me to send the message. The return message said I had to DELETE the ACCOUY! I contacted again and they told me to delete and reinstall the APP , which is easy enough but they did not check if the issue was repaired and closed the chat abruptly!! The app is working now but not thanks to them!!
-- Mercurio Dorado, 2023-07-20

### *---- "FH"
Will not work / install properly on my iPhone (iPhone 13 pro iOS 16.4.1)
Installed on my iPad calling feature not working and if they are the signal is very poor. Brought up the problems to the “technical “ support team. They are very committed but can not give any solutions. Trying to get a refund no response.
-- Vietdad, 2023-04-20

### ***-- "App has worked great until iOS 10"
This app has worked perfectly up until iOS released now when using the app on Bluetooth there is a continuous drop in and out creating a clicking chop to the call.  Please address this issue...
-- The truth or can you handle it, 2016-11-05

### *---- "Crashes on iPhone 6+, iOS 8.3"
Used to work on iOS 8.2
-- RSP1624, 2015-05-08

[View all 1SIM VoIP reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## 1SIM VoIP Discovered Keywords
- ip telecom
- 1sim voip

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## 1SIM VoIP Available In
- [United States](https://apptail.io/app/1sim-voip-NeV/united-states)
- [Canada](https://apptail.io/app/1sim-voip-NeV/canada)
- [Russia](https://apptail.io/app/1sim-voip-NeV/russia)
- [Argentina](https://apptail.io/app/1sim-voip-NeV/argentina)
- [Colombia](https://apptail.io/app/1sim-voip-NeV/colombia)
- [Philippines](https://apptail.io/app/1sim-voip-NeV/philippines)
- [United Kingdom](https://apptail.io/app/1sim-voip-NeV/united-kingdom)
- [Peru](https://apptail.io/app/1sim-voip-NeV/peru)
- [South Africa](https://apptail.io/app/1sim-voip-NeV/south-africa)
- [Australia](https://apptail.io/app/1sim-voip-NeV/australia)
- [Brazil](https://apptail.io/app/1sim-voip-NeV/brazil)
- [Dominican Republic](https://apptail.io/app/1sim-voip-NeV/dominican-republic)
- [Estonia](https://apptail.io/app/1sim-voip-NeV/estonia)
- [Spain](https://apptail.io/app/1sim-voip-NeV/spain)
- [France](https://apptail.io/app/1sim-voip-NeV/france)
- [Hungary](https://apptail.io/app/1sim-voip-NeV/hungary)
- [Japan](https://apptail.io/app/1sim-voip-NeV/japan)
- [South Korea](https://apptail.io/app/1sim-voip-NeV/south-korea)
- [Lebanon](https://apptail.io/app/1sim-voip-NeV/lebanon)
- [Mexico](https://apptail.io/app/1sim-voip-NeV/mexico)
- [United Arab Emirates](https://apptail.io/app/1sim-voip-NeV/united-arab-emirates)
- [Finland](https://apptail.io/app/1sim-voip-NeV/finland)
- [Türkiye](https://apptail.io/app/1sim-voip-NeV/turkey)
- [Switzerland](https://apptail.io/app/1sim-voip-NeV/switzerland)
- [Greece](https://apptail.io/app/1sim-voip-NeV/greece)
- [Hong Kong SAR China](https://apptail.io/app/1sim-voip-NeV/hong-kong)
- [Taiwan](https://apptail.io/app/1sim-voip-NeV/taiwan)
- [Indonesia](https://apptail.io/app/1sim-voip-NeV/indonesia)
- [Ireland](https://apptail.io/app/1sim-voip-NeV/ireland)
- [India](https://apptail.io/app/1sim-voip-NeV/india)
- [Iceland](https://apptail.io/app/1sim-voip-NeV/iceland)
- [Italy](https://apptail.io/app/1sim-voip-NeV/italy)
- [Ukraine](https://apptail.io/app/1sim-voip-NeV/ukraine)
- [Austria](https://apptail.io/app/1sim-voip-NeV/austria)
- [Kuwait](https://apptail.io/app/1sim-voip-NeV/kuwait)
- [Kazakhstan](https://apptail.io/app/1sim-voip-NeV/kazakhstan)
- [Uzbekistan](https://apptail.io/app/1sim-voip-NeV/uzbekistan)
- [Latvia](https://apptail.io/app/1sim-voip-NeV/latvia)
- [Madagascar](https://apptail.io/app/1sim-voip-NeV/madagascar)
- [Malta](https://apptail.io/app/1sim-voip-NeV/malta)
- [Vietnam](https://apptail.io/app/1sim-voip-NeV/vietnam)
- [Malaysia](https://apptail.io/app/1sim-voip-NeV/malaysia)
- [Nigeria](https://apptail.io/app/1sim-voip-NeV/nigeria)
- [Netherlands](https://apptail.io/app/1sim-voip-NeV/netherlands)
- [Norway](https://apptail.io/app/1sim-voip-NeV/norway)
- [Nepal](https://apptail.io/app/1sim-voip-NeV/nepal)
- [New Zealand](https://apptail.io/app/1sim-voip-NeV/new-zealand)
- [Belarus](https://apptail.io/app/1sim-voip-NeV/belarus)
- [Brunei](https://apptail.io/app/1sim-voip-NeV/brunei)
- [Pakistan](https://apptail.io/app/1sim-voip-NeV/pakistan)
- [Poland](https://apptail.io/app/1sim-voip-NeV/poland)
- [Portugal](https://apptail.io/app/1sim-voip-NeV/portugal)
- [Romania](https://apptail.io/app/1sim-voip-NeV/romania)
- [Azerbaijan](https://apptail.io/app/1sim-voip-NeV/azerbaijan)
- [Saudi Arabia](https://apptail.io/app/1sim-voip-NeV/saudi-arabia)
- [Chile](https://apptail.io/app/1sim-voip-NeV/chile)
- [Czechia](https://apptail.io/app/1sim-voip-NeV/czechia)
- [Germany](https://apptail.io/app/1sim-voip-NeV/germany)
- [Denmark](https://apptail.io/app/1sim-voip-NeV/denmark)
- [Sweden](https://apptail.io/app/1sim-voip-NeV/sweden)
- [Algeria](https://apptail.io/app/1sim-voip-NeV/algeria)
- [Ecuador](https://apptail.io/app/1sim-voip-NeV/ecuador)
- [Singapore](https://apptail.io/app/1sim-voip-NeV/singapore)
- [Egypt](https://apptail.io/app/1sim-voip-NeV/egypt)
- [Thailand](https://apptail.io/app/1sim-voip-NeV/thailand)

---

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