Technical FAQ

For definitive eSIM support verification, navigate to your device's settings. On iOS, access "Settings" > "Cellular" > "Add eSIM". On Android, search for "eSIM" or "Add mobile plan" in network settings. The presence of these options indicates hardware and software readiness. Additionally, consult your device manufacturer's official specifications page or support documentation, referencing the specific model number to confirm eSIM capability, particularly for regional variants.

Yes, a carrier-locked device may prevent eSIM activation or usage with our services. eSIM functionality, similar to physical SIMs, is often subject to the carrier's locking policy. Devices must be carrier-unlocked to ensure full compatibility and interoperability with third-party eSIM profiles, including ours. We recommend contacting your current mobile network operator to ascertain your device's unlock status and initiate the unlocking process if necessary, prior to attempting eSIM installation.

Yes, certain device models manufactured for specific regional markets may omit eSIM hardware, even if the broader product line supports it. For instance, some iPhone variants sold in mainland China or Hong Kong utilize dual physical SIMs instead of eSIM. Always verify the precise model number (e.g., AXXXX) against the manufacturer's official specifications for your specific region of purchase. Relying solely on the device's brand or general model name is insufficient for accurate eSIM compatibility assessment.

Affirmative. eSIM functionality often necessitates a minimum operating system (OS) version for optimal performance and security protocol compliance. Newer eSIM features, such as QR code scanning for profile download or specific activation methods, may be absent or unstable on outdated OS builds. Ensure your device is updated to the latest available stable OS version. Consult your device manufacturer's support documentation for the recommended OS baseline for full eSIM capability and feature set.

Scanning failures often stem from environmental factors or display issues. Ensure sufficient ambient light, minimize screen glare, and maintain a stable distance for camera focus. Verify the QR code is displayed clearly and not distorted. If scanning remains unsuccessful, our platform provides the necessary SM-DP+ address and Activation Code for manual installation, accessible via your CoreESIM account dashboard. Refer to device-specific instructions for manual entry procedures.

We recommend installing your eSIM profile prior to departure, ideally when connected to a stable Wi-Fi network. However, defer activation of the cellular plan, typically by leaving it toggled 'Off' in your device's cellular settings, until you reach your destination. This methodology prevents premature data consumption and ensures immediate network registration upon entry into the covered geographical region. Confirm data roaming is enabled for the eSIM line.

First, confirm the eSIM profile is enabled in your device's cellular settings. Verify that 'Data Roaming' is activated for the eSIM line. Next, check if the Access Point Name (APN) settings match our specifications, if provided (often default). Perform a device restart. If issues persist, manually select a network operator from the available list in your device's network settings, ensuring it is a CoreESIM supported partner in your current location.

Yes, an active internet connection is essential for the initial provisioning and download of the eSIM profile onto your device. This connection facilitates secure communication with the remote provisioning server (SM-DP+). We strongly recommend utilizing a stable Wi-Fi network or an existing cellular data connection to ensure successful and uninterrupted installation of your CoreESIM plan. Without an internet connection, the profile cannot be downloaded to your device.

Optimal data volume estimation depends on anticipated usage patterns. Basic navigation and messaging consume minimal data. Streaming video or frequent video calls significantly increase consumption. Consider local Wi-Fi availability at your destination. We recommend analyzing your typical daily data usage prior to travel and adding a buffer, or opting for a slightly larger plan than initially calculated to mitigate service interruption risks.

Upon expiration of the defined validity period, the data service associated with that specific eSIM profile will cease operation. Your device will no longer transmit or receive data via this profile. To restore service, you must purchase a new data plan. Depending on the plan specifications, a top-up option might be available, otherwise a new eSIM profile installation may be required for continued connectivity.

A local data plan provides cellular data connectivity within a single, specified country, leveraging partnerships with Mobile Network Operators (MNOs) in that specific jurisdiction. A regional data plan, conversely, offers connectivity across a predefined group of countries within a contiguous geographic area. Regional plans are designed for multi-country itineraries, simplifying connectivity management by obviating the need for separate local profiles per nation.

Network performance for regional plans can exhibit variability across included countries. This is primarily influenced by the infrastructure quality, spectrum allocation, and roaming agreements of the local Mobile Network Operators (MNOs) in each specific territory. While we endeavor to partner with high-quality MNOs, local network conditions, congestion, and geographic factors are determinants in overall user experience.

We accept major credit and debit cards, including Visa, MasterCard, American Express, and Discover. Transactions are processed via secure payment gateways compliant with PCI DSS standards, ensuring cryptographic integrity and confidentiality of payment data. Alternative digital payment solutions may also be supported based on regional availability and platform integration. All transactions are subject to standard authorization protocols to mitigate transactional risks and ensure compliance.

Refunds are processed if a purchased plan cannot be activated due to a technical failure attributable to our system, provided the issue is reported within a specified timeframe post-purchase and prior to any data consumption. Eligibility requires verification that the device meets all specified compatibility criteria. Plans that have been successfully activated, partially consumed, or expired are generally non-refundable. All refund requests are subject to our terms of service agreement and internal review processes.

To augment data on an active eSIM profile, navigate to your account dashboard and select the 'Top-Up' option associated with your active plan. You will be presented with available data packages and validity extensions. Upon successful transaction, the additional data volume is provisioned directly onto your existing eSIM profile, maintaining network continuity. The new data and/or validity period typically commences immediately following the successful top-up operation, ensuring seamless service.

The prices displayed for our eSIM plans are inclusive of all applicable Value Added Tax (VAT) or Goods and Services Tax (GST) as mandated by relevant jurisdictions. We adhere to a transparent pricing model; therefore, no hidden surcharges or additional fees will be applied during the checkout process by us. However, local regulatory fees or specific taxes imposed by an end-user's financial institution are beyond our control and may be applied by them.

Our product pages detail network partners and their coverage maps. Coverage is contingent on local infrastructure, geographical topography, and roaming agreements with Mobile Network Operators (MNOs). We recommend cross-referencing these resources with your anticipated travel route for optimal service predictability. Device antenna performance and local signal attenuation also influence effective signal acquisition and service availability.

Network speed is influenced by multiple parameters: the local MNO's infrastructure capacity, current network congestion, device modem capabilities (e.g., LTE Category support), and signal strength. Bandwidth allocation by the MNO and Quality of Service (QoS) policies applied to roaming traffic can also modulate effective throughput. We provision access to available network tiers as negotiated with our MNO partners.

5G service availability is contingent upon the local Mobile Network Operator's (MNO) 5G network deployment in your specific location, your device's 5G modem compatibility, and our roaming agreements. While our plans facilitate access where technically feasible, 5G is not universally deployed globally. Expect variability; service may default to LTE/4G based on local infrastructure, signal conditions, and network prioritization protocols.

Optimal 5G performance abroad requires a device with a 5G-capable modem supporting the specific frequency bands deployed by the local Mobile Network Operator (MNO). Different regions utilize varying 5G NR bands (e.g., n78, n28, n258). Device compatibility with these bands, alongside its antenna array design and processing capabilities, directly influences potential speeds, latency, and connectivity stability. Incompatible or older devices may lack required band support.

Our eSIM plans generally support personal hotspot (tethering) functionality, contingent on device capabilities and the host network's policies. Data utilized for tethering is drawn directly from your active plan's allocated volume. Ensure your device's operating system is configured for hotspot sharing. Network performance for tethered devices aligns with the primary eSIM connection parameters and available bandwidth in your location.

Our eSIM plans are provisioned exclusively for data transmission and do not inherently include a dedicated local phone number for Public Switched Telephone Network (PSTN) voice calls or SMS. For voice communication requirements, users are advised to leverage Voice over IP (VoIP) applications such as WhatsApp, Skype, or similar platforms, which operate over the provided data connection utilizing the internet protocol suite.

Our eSIM profiles are optimized for data-centric operations and do not support native Short Message Service (SMS) transmission or reception. This design prioritizes data efficiency and network integration for internet-based communication. For text-based communication, users should utilize over-the-top (OTT) messaging applications that function via the established data connection, such as WhatsApp, Telegram, or similar platforms.

Yes, WhatsApp, being an Over-The-Top (OTT) application, relies exclusively on an active data connection for its operational protocols. Our eSIM data plans provide the requisite internet access, enabling full WhatsApp functionality, including messaging, voice calls, and video calls. Your pre-existing WhatsApp account, tied to your primary phone number, will retain its operational status without requiring a new registration.

Configure device cellular settings to designate the eSIM for "Cellular Data" and your physical SIM (home line) for "Voice & SMS." Disable "Allow Cellular Data Switching" to prevent inadvertent roaming data consumption on your home SIM. This ensures the eSIM prioritizes all data traffic, maintaining your home line for communication functions without data conflict, optimizing resource allocation.

Yes. If your home SIM remains active and registers on a foreign network, standard roaming charges for voice calls and SMS will apply for inbound and outbound communications. This occurs independently of eSIM data routing. To mitigate, disable "Data Roaming" for your home SIM and consider utilizing "Wi-Fi Calling" through your home carrier, or temporarily deactivating the home SIM's cellular service.

Affirmative. Dual SIM functionality permits concurrent network registration for both profiles. Your device will route primary data traffic via our eSIM, while your home SIM remains registered on the roaming partner network for voice and SMS reception. Incoming communications will be processed, but standard roaming rates from your home carrier's plan may be applicable for these services.

Device behavior typically prompts for preferred line selection for outgoing calls. Alternatively, a default voice line can be pre-configured in cellular settings. If our eSIM does not support traditional PSTN services, the device will automatically route outgoing calls via the home SIM, incurring applicable roaming charges as per your home carrier's plan.

For optimal connectivity, ensure the Access Point Name (APN) for your eSIM profile is correctly configured. Navigate to your device's cellular settings, select the CoreESIM profile, and locate the APN settings. The required APN is typically `internet` (all lowercase, no spaces). Verify that this value is entered precisely. After modification, save the settings and power cycle your device to re-establish network registration. Incorrect APN settings can prevent data transmission despite a visible network signal.

If data speeds are degraded beyond expected parameters, first verify device firmware is current. Conduct a network reset via device settings, which clears cached network configurations. Observe if performance improves during off-peak hours, indicating potential localized network congestion. Confirm no background applications are consuming excessive bandwidth. If persistent, temporarily disable 5G and force LTE to isolate potential 5G NSA (Non-Standalone) specific issues. Document speed test results and device configuration for subsequent support inquiries, referencing ITU-T E.800 series recommendations for service quality assessment.