What is OnePhone: Complete Guide to the Mobile Cloud PBX, Travel eSIM, and Virtual Numbers

OnePhone is a mobile application developed by OneVOIPlanet for iOS and Android devices. It functions as a cloud PBX inside a smartphone, combining global mobile data services and virtual business telephony into a single interface.

Through the app, users access two primary telecom products: travel eSIM profiles for mobile data across foreign destinations and virtual numbers for receiving and making voice calls without additional telecom hardware.

Instead of acquiring physical SIM cards from local providers upon arrival in a new country or maintaining physical SIP desk phones for international business, OnePhone handles network profile distribution and inbound or outbound call routing digitally. All provisioning, plan selections, balance top-ups, and network monitoring take place directly inside the application interface.

The travel eSIM feature in OnePhone provides data connectivity across more than 200 countries and regions. It eliminates roaming fees by allowing users to purchase localized or regional digital data profiles before or during international travel.

• Data plan customization: Users can select local data tariffs for individual countries or regional tariffs covering multiple countries. Plans are customizable by duration (number of days) and data volume (measured in gigabytes).
• Multi-profile storage: The app allows users to hold and store more than 5 eSIM profiles simultaneously on a supported device.
• My eSIM management dashboard: A dedicated section within OnePhone that displays real-time data balance, current data consumption, profile activation status, and the exact validity period of each active profile.
• In-app top-ups: Users can replenish their data balance directly inside the app without needing to re-install or re-configure network settings.
• Fast activation: Once configured, the eSIM connects to local cellular networks within 5 to 10 minutes.

For travelers visiting Ukraine, OnePhone provides dedicated eSIM profiles directly from local mobile network operators, including lifecell and Vodafone, offering standard operator carrier rates.

OnePhone provides step-by-step setup guides directly inside the interface under Help > eSIM Connection. Users can install their digital cellular profiles using two standard methods:

1. QR code setup: Scan the generated activation QR code using the device system camera or mobile network settings.
2. Manual setup: Copy and paste the SM-DP+ address and activation code provided in the app into the network settings menu of the operating system.

Global travel eSIM plans available in OnePhone start from $2.99 depending on the target destination and selected data allowance. The table below outlines starting prices for popular destinations available in the application catalog:

Virtual numbers allow individuals and companies to establish a local phone presence in foreign markets without physical offices or hardware setups. All calls to and from these numbers are processed directly inside the OnePhone app over an active internet connection (Wi-Fi or cellular data).

The full global catalog of OneVOIPlanet virtual numbers, covering 93 countries, is accessible directly within the OnePhone interface. Users can browse available country codes, select specific line types, purchase numbers, and manage renewal terms inside the application.

Base prices for virtual numbers start from $5.99 per month.

In-app virtual number pricing varies based on the designated country code. The following table reflects fixed monthly starting rates available inside OnePhone for specific countries:

Before purchasing or installing a digital SIM profile, check whether your smartphone supports eSIM technology and is not locked to a single mobile network operator.

To verify eSIM support and carrier unlock status on an Apple device:

1. Open Settings on your iPhone.
2. Select General, then tap About.
3. Scroll down to the Carrier Lock field. Verify that it displays No SIM restrictions.
4. Alternatively, navigate to Settings > Mobile Service (or Cellular) and verify whether the Add eSIM option is present.

To verify eSIM support on an Android smartphone (such as Google Pixel or Samsung Galaxy models):

1. Open Settings.
2. Tap Connections (or Network & internet).
3. Select SIM Manager (or SIMs).
4. Look for the Add eSIM or Add mobile plan option.

If these options are visible and the device is unlocked, your smartphone can host profiles generated by OnePhone.

Setting up mobile connectivity or business telephony through OnePhone requires three main steps:

1. Install the application: Download and install the OnePhone app on your iOS or Android device.
2. Select country and plan: Open the app catalog, choose your target destination (for travel eSIM) or country code (for virtual numbers), and select a plan based on your preferred volume, validity period, or price point.
3. Activate eSIM before the trip: If configuring mobile data for travel, complete the installation procedure before departure using the instructions located in Help > eSIM Connection.

OnePhone supports instant checkout for both digital data profiles and virtual line subscriptions directly inside the app. Supported payment methods include:

• Payment cards (credit and debit)
• Apple Pay
• Google Pay

For troubleshooting, account inquiries, or configuration assistance, OnePhone includes access to 24/7 live chat customer support directly within the application.

OnePhone serves specific operational use cases across business and personal communication:

• Frequent travelers and digital nomads: Individuals who need immediate data connectivity across multiple foreign countries without switching physical SIM cards or paying international roaming charges.
• International businesses and remote teams: Companies that require localized business phone numbers in global markets to handle customer service or sales inquiries on mobile devices without maintaining physical branch offices.
• Expatriates and international specialists: Users who need secondary lines from their home country (such as dedicated Ukraine numbers via lifecell or Vodafone rates) while residing abroad.