How Our Network Works – Advanced eSIM Architecture

Cellesim is built on a multi-carrier, locally routed mobile data architecture designed for international travelers who need fast, stable, and transparent connectivity.

By combining local carrier partnerships, intelligent network selection, and clear traffic policies, Cellesim removes the technical limitations of traditional roaming.

Local Breakout Multi-Carrier Architecture

Unlike conventional roaming solutions that route traffic through centralized international gateways, Cellesim uses local breakout routing in supported destinations.

How this works at a technical level:

• Your eSIM authenticates directly on local mobile network operators (MNOs)
• Data traffic exits within the destination country
• Long-distance routing is avoided, reducing latency
• IP allocation follows local network standards

Result: faster speeds, lower ping times, and more reliable application performance.

Intelligent Network Selection Engine

Each Cellesim eSIM includes a dynamic network selection layer that continuously evaluates available partner networks.

Your device automatically considers:

• Signal strength (RSSI)
• Network congestion levels
• Availability of multiple local carriers
• Radio access technology (5G or LTE)

When conditions change, the connection switches seamlessly to the optimal network — without manual configuration or user intervention.

This is especially beneficial in:

• Airports and transit hubs
• Dense urban environments
• Road trips and cross-border travel

5G & LTE Priority with Automatic Fallback

Cellesim supports 5G and 4G LTE where device compatibility and local infrastructure allow.

Network priority logic:

• 5G is used when available
• LTE is used when 5G is not available
• Automatic fallback ensures continuity during coverage changes

This guarantees continuous connectivity without interruptions.

Transparent Traffic Management

(No Throttling Unless Clearly Stated)

Cellesim does not apply artificial speed throttling or hidden traffic shaping unless explicitly stated in the plan details.

Our core principles:

• No hidden speed caps
• No protocol-based throttling
• No time-based slowdowns

If a plan includes:

• Fair usage thresholds
• Speed reduction after data usage
• Operator-imposed limitations

These conditions are clearly disclosed before purchase.

Secure & Private Mobile Data Connectivity

All Cellesim connections operate through:

• Licensed mobile network operators
• Standard carrier-grade mobile encryption
• Secure authentication protocols

Cellesim does not:

• Inspect user data payloads
• Inject ads or tracking layers
• Sell or monetize user traffic

Your connection remains private, secure, and carrier-grade.

Device Compatibility & eSIM Provisioning

Cellesim eSIM profiles are:

• Fully GSMA-compliant
• Compatible with eSIM-enabled iOS and Android devices
• Delivered via secure QR code provisioning

After installation:

• No physical SIM card is required
• Activation occurs on first supported network attachment
• Each eSIM profile remains isolated per device

Pre-Provisioned Activation Before You Travel

You can install your eSIM before leaving home.

Once you arrive:

• Network attachment happens automatically
• Data sessions start within seconds
• No APN settings or manual configuration are required

This removes:

• Airport SIM card queues
• Roaming activation delays
• Local SIM registration requirements

Designed for High-Demand Travel Use

Cellesim’s network architecture supports:

• Navigation and real-time maps
• Video calls and conferencing
• Cloud services and remote work
• Secure hotspot sharing (device-dependent)

Built for travelers who rely on connectivity — not just casual browsing.

Traditional Roaming vs Local eSIM Architecture

Traditional Roaming

• Centralized international traffic routing
• Higher latency due to long-distance data paths
• Limited access to local carriers
• Restrictive or unclear traffic policies
• Manual or delayed activation

Cellesim Local eSIM Architecture

• Local breakout routing within the destination country
• Lower latency and faster response times
• Multi-carrier access to local networks
• Fully transparent usage policies
• Instant activation via secure QR code

Why Local eSIM Architecture Performs Better

• Data is routed locally instead of across continents
• Network selection adapts dynamically to changing conditions
• Performance remains stable in high-density environments
• Users avoid roaming-related delays and hidden restrictions

Engineered for Modern Travel

Cellesim was created by travelers who experienced roaming limitations firsthand.

By engineering a local, multi-carrier, and transparent network, we built a connectivity solution designed for how people travel today.