OneSim VoIP lets OneSimCard customers place international calls over Wi‑Fi or mobile data at low rates, with routing options between VoIP and the OneSimCard SIM. The newer version adds SMS texting (US/Canada) via a VOIP-enabled PEN. The app has over 10k downloads and 94 ratings, reflecting its long-standing presence in COMMUNICATION.
Pros & Cons
Low-cost international calling compared to roaming rates
Flexible routing between VoIP and OneSimCard SIM
SMS texting added in newer version for US/Canada
No SIM is required if you have a OneSimCard account and PEN
No explicit 'free' or 'unlimited' calling branding in the listing
Lacks a clear worldwide/global coverage claim
Requires a OneSimCard PEN and account (not a standalone generic VoIP app)
About OneSim VoIP
OneSim VoIP is a communication app developed by OneSimCard.com.
Download Statistics
OneSim VoIP has been downloaded 27 thousand times. In the last 30 days, the app was downloaded 49 times.
User Ratings
OneSim VoIP is rated 2.89 out of 5 stars. The rating is based on 92 ratings.
App Information
OneSim VoIP is FREE to download. The APK download size is 54.19 MB. The latest version available is 3.3.0. The last update was on May 19, 2026.
Technical Requirements
OneSim VoIP requires Android 4.4W+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since November 2011.
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.
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★★★★★5 star music world global unerground· Mar 25, 2021
Good business thank you for your business and everything
★★★★★Phil Laffy· Aug 24, 2023
Works great for low cost international calls when traveling
★★★★★Ground Zero· Jun 15, 2023
Tho I agree, if working fine, don't try to do so much update, but this app update is long overdue. Latest update have simple, better looking interfaces, background running is ok, seems like everything work better.
★★★★☆Chris Davis· Jun 14, 2017
I use OneSimCard for travel when my primary phone can't be used. Using VOIP costs less than making calls on the wireless carrier. The only thing I don't like about this app is it will only ring on vibrate.
★★★★★A Google user· Jan 4, 2018
I got onesimcard for travel, and with this app I use the same phone number dirt cheap with Wi-Fi & still stay in touch when I don't. Used it in 6 countries on 3 continents. Very convenient & efficient. Also comes in handy in buildings where mobile service is bad; it works wherever Wi-Fi does, and I can easily call any phone number (unlike other VOIP apps).
★☆☆☆☆A Google User· Sep 19, 2012
Receiving call is expensive to the calling to sim card. The voip use Wi-Fi if you have Wi-Fi available you are better go Skype or Obi.
★☆☆☆☆khaled A.· Jun 4, 2021
Very poor customer servive no one can help. Multiple crashes. Poor quality. Don't use it
★☆☆☆☆Emmy Marcel· Oct 12, 2021
Can't work up to standard, it all about money money money. I spent a lot yet no result. App crashes, even SIM cards crashes, this is crazy. How do you cope with US based communication companies? Very annoying
Google Play Rankings for OneSim VoIP
This app is not ranked
Technologies used by OneSim VoIP
26 permissions·5 libraries
Subscribe to see full permission and library details
Trust & Safety: The app requests a broad set of permissions, including location, network state, notifications, internet, microphone, camera, and contacts, along with boot and foreground service permissions. This aligns with VoIP/SMS functionality but warrants a privacy review and minimization to protect user data.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
