# WhatSnap SMS Reliability

Understanding WhatSnap's reliability, infrastructure, and how we ensure consistent SMS delivery.

## How reliable is WhatSnap SMS?

**Extremely reliable** - WhatSnap leverages robust cloud infrastructure and proven SMS technology to ensure exceptional reliability for your business messaging.

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## Infrastructure & Uptime

### AWS Cloud Platform

WhatSnap is built on **Amazon Web Services (AWS)**, one of the world's most reliable cloud platforms.

**AWS Benefits:**

* ✅ **99.99% uptime SLA** for core services
* ✅ **Redundant systems** across multiple data centers
* ✅ **Data replication** across availability zones
* ✅ **Automatic failover** mechanisms
* ✅ **DDoS protection** and security
* ✅ **Global edge locations** for fast connectivity

**What This Means for You:**

* 🟢 **Minimal downtime** - AWS infrastructure is enterprise-grade
* 🟢 **Fast message processing** - Low latency worldwide
* 🟢 **Secure connections** - Bank-level encryption
* 🟢 **Automatic recovery** - If one server has issues, traffic automatically routes to healthy servers

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**Enterprise Infrastructure**: WhatSnap runs on the same infrastructure used by Netflix, Airbnb, and thousands of enterprise companies. Your messages benefit from world-class reliability.
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## How WhatSnap SMS Reliability Works

### Three-Layer Reliability Model

**Layer 1: WhatSnap Cloud Platform (AWS)**

* Handles message routing
* Manages device connections
* Processes workflows
* Stores message logs
* **Reliability: 99.99% uptime**

**Layer 2: Internet Connection**

* Your Android device's internet (WiFi or mobile data)
* Connection to WhatSnap servers
* **Reliability: Depends on your internet provider**

**Layer 3: Carrier Network**

* Your SIM card carrier (Verizon, AT\&T, Vodafone, etc.)
* SMS delivery infrastructure
* **Reliability: Typically 95-99% delivery rate**

### Overall Reliability

**Combined System Reliability:**

* **WhatSnap Platform**: 99.99% uptime
* **Device Connectivity**: 99%+ (with proper setup)
* **Carrier Delivery**: 95-99% (typical SMS delivery rates)

**Result: 95-99% end-to-end reliability** for message delivery when properly configured.

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## Will your system crash or go down?

**Short Answer: Extremely unlikely.**

### What Makes WhatSnap Reliable

**1. AWS Infrastructure**

* **Redundancy**: Multiple servers in different data centers
* **Automatic Failover**: If one server fails, traffic routes to healthy servers
* **Monitoring**: 24/7 automated monitoring and alerts
* **Maintenance**: AWS handles all hardware and network maintenance

**2. Proven Technology**

* **Mature Protocols**: Uses standard WhatsApp Web and Android SMS protocols
* **No Experimental Tech**: Built on battle-tested messaging infrastructure
* **Millions of Messages**: Processes high volumes daily without issues

**3. Proactive Monitoring**

* **Real-time Alerts**: WhatSnap team notified immediately of any issues
* **Performance Tracking**: Continuous monitoring of system health
* **Quick Response**: Issues resolved typically within minutes

### Historical Uptime

**WhatSnap Track Record:**

* **99.9%+ uptime** since launch
* **Planned maintenance**: Announced 24+ hours in advance
* **Unplanned downtime**: Rare (< 0.1% of time)
* **Average issue resolution**: < 30 minutes

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**Transparency**: We publish status updates at \[status.whatsnap.ai] during any service interruptions. You can also enable notifications for real-time alerts.
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***

## Factors That Affect Reliability

While WhatSnap's infrastructure is highly reliable, these factors can impact your specific setup:

### 1. Device Connectivity (Your Control)

**High Impact:**

* ⚠️ **Unstable WiFi/mobile data** → Messages delayed or queued
* ⚠️ **Device powered off** → No messages sent until device back online
* ⚠️ **Battery optimization killing app** → Gateway disconnects

**Solutions:**

* Use stable WiFi or reliable mobile data
* Keep device plugged in 24/7
* Disable battery optimization for WhatSnap Gateway app
* Monitor device status in WhatSnap dashboard

See: [Device Configuration Best Practices](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-installation-setup#device-configuration-best-practices)

### 2. Carrier Network (Carrier Control)

**Moderate Impact:**

* ⚠️ **Carrier outages** → Temporary delivery failures (rare)
* ⚠️ **Poor signal strength** → SMS delays
* ⚠️ **Fair use policy violations** → Account restrictions

**Solutions:**

* Choose reliable carriers (see [SIM Plan Recommendations](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-specifications#sim-plan-recommendations-by-country))
* Ensure strong signal where device is located
* Follow carrier fair use policies
* Have backup SIM from different carrier

### 3. Android Device (Your Control)

**Low-Moderate Impact:**

* ⚠️ **Low-end devices** → Occasional app crashes
* ⚠️ **Aggressive power management** → App killed in background
* ⚠️ **Software updates** → Temporary restarts

**Solutions:**

* Use [recommended devices](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-specifications#recommended-devices) (4 GB RAM+)
* Configure proper power management settings
* Schedule updates during off-hours
* Monitor device health regularly

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## Reliability Features Built Into WhatSnap

### 1. Message Queuing

**How It Works:**

* Messages that can't be sent immediately are **queued**
* Queue holds messages until device reconnects
* Automatic retry when connection restored

**Example:**

* Device loses WiFi at 2:00 PM
* 5 messages attempted during outage
* Device reconnects at 2:30 PM
* All 5 messages automatically sent within minutes

### 2. Connection Monitoring

**Real-Time Status:**

* WhatSnap dashboard shows device status (Online/Offline)
* Mobile push notifications when device disconnects
* Email alerts for extended downtime (optional)

**Proactive Alerts:**

* Know immediately if device goes offline
* Address issues before customers notice
* Track device uptime history

### 3. Delivery Confirmation

**Message Tracking:**

* Real-time delivery status for every message
* "Sent", "Delivered", "Failed" indicators
* Failed message notifications (optional)

**Benefits:**

* Know if messages aren't delivering
* Quickly troubleshoot issues
* Maintain high quality standards

### 4. Multi-Device Redundancy

**Scale & Backup:**

* Connect multiple Android devices
* Distribute load across devices
* If one device fails, others continue working

**Setup:**

* Configure multiple SIMs in WhatSnap dashboard
* Use workflows to distribute contacts
* Monitor each device independently

See: [Multiple SMS Accounts Guide](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/multiple-sms-accounts)

***

## Reliability Comparison: WhatSnap vs. Twilio

| Factor                 | WhatSnap P2P SMS                  | Twilio A2P SMS                      |
| ---------------------- | --------------------------------- | ----------------------------------- |
| **Platform Uptime**    | 99.99% (AWS)                      | 99.95% (SLA)                        |
| **SMS Delivery Rate**  | 95-99% (carrier-dependent)        | 95-99% (carrier-dependent)          |
| **Device Dependency**  | Yes (Android device must be on)   | No (cloud-based)                    |
| **Carrier Dependency** | Yes (your SIM carrier)            | Yes (Twilio's carrier partnerships) |
| **Redundancy Options** | Multi-device setup (your control) | Built-in (Twilio manages)           |
| **Recovery Time**      | Manual (restart device/app)       | Automatic (cloud failover)          |
| **Cost of Redundancy** | Low (add more devices)            | High (enterprise pricing)           |

**Summary:**

* **Twilio**: Slightly higher SLA but at premium cost
* **WhatSnap**: Excellent reliability with manual device management
* **Best Practice**: Use both - WhatSnap for conversational messaging, Twilio for critical transactional

***

## Maximizing Your Reliability

### Essential Setup

**1. Hardware:**

* [ ] Use reliable Android device (4 GB RAM+)
* [ ] Stable power source (plugged in 24/7)
* [ ] UPS backup power (optional but recommended)

**2. Connectivity:**

* [ ] Stable WiFi (primary)
* [ ] Mobile data as backup
* [ ] Signal strength: 3-4 bars minimum

**3. Configuration:**

* [ ] Battery optimization: Disabled
* [ ] App auto-start: Enabled
* [ ] Background restrictions: Disabled
* [ ] Automatic updates: Disabled (manual during off-hours)

See: [Complete Device Configuration Guide](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-installation-setup#device-configuration-best-practices)

### Monitoring & Maintenance

**Daily (30 seconds):**

* [ ] Check WhatSnap dashboard for device status
* [ ] Verify "Connected" status in Gateway app

**Weekly (5 minutes):**

* [ ] Review delivery rates (target >95%)
* [ ] Check for pending Android updates
* [ ] Verify battery optimization still disabled

**Monthly (15 minutes):**

* [ ] Full device restart
* [ ] Review message volume and performance
* [ ] Test backup devices (if applicable)
* [ ] Update WhatSnap Gateway app if available

### Backup Strategy

**Recommended Redundancy:**

* **Primary device**: Main SIM, handles bulk of messages
* **Backup device**: Second SIM, standby or handles overflow
* **Different carrier**: Reduces single-point-of-failure risk

**Implementation:**

* Configure both devices in WhatSnap dashboard
* Use workflows to split load 70/30 or 50/50
* If primary fails, manually shift all traffic to backup
* Or: Use backup only during primary maintenance

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## Troubleshooting Reliability Issues

### Device Frequently Disconnects

**Common Causes:**

* Unstable WiFi
* Battery optimization killing app
* Low device memory
* Manufacturer restrictions (Xiaomi, Huawei)

**Solutions**: See [Troubleshooting Guide](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/troubleshooting)

### Messages Delayed or Queued

**Common Causes:**

* Device offline temporarily
* Carrier network congestion
* High volume exceeding carrier limits

**Solutions**:

* Check device connection
* Reduce sending rate
* Add more devices for distribution

### Low Delivery Rate (<95%)

**Common Causes:**

* Spam-like content
* Sending too fast
* Carrier flagging account
* Invalid phone numbers

**Solutions**: See [Database Reactivations - Avoiding Blocks](https://whatsnap.gitbook.io/whatsnap-docs/faq/sms/broken-reference)

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## Summary: WhatSnap Reliability

**Infrastructure:**

* ✅ 99.99% uptime (AWS cloud platform)
* ✅ Redundant systems and automatic failover
* ✅ Enterprise-grade security and monitoring

**Your Responsibility:**

* ⚙️ Keep device online with stable internet
* ⚙️ Proper device configuration
* ⚙️ Regular monitoring and maintenance

**Result:**

* 📊 **95-99% end-to-end reliability** when properly configured
* 📊 **Better than traditional SMS** in most cases
* 📊 **Comparable to Twilio** for P2P messaging use cases

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**Bottom Line**: WhatSnap SMS is highly reliable for business use. With proper device setup and monitoring, you can achieve 99%+ message delivery rates consistently.
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***

## Related Resources

* [Device Specifications](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-specifications)
* [Installation & Configuration](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/sms-installation-setup)
* [Troubleshooting](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/troubleshooting)
* [Multiple Devices for Redundancy](https://whatsnap.gitbook.io/whatsnap-docs/account-management/sms/multiple-sms-accounts)

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**Reliability concerns?** Contact support at <support@whatsnap.ai> to discuss your specific use case and setup recommendations.
