SIMtrix - SIM Calls & SMS

SIMtrix bridges your Android phone's SIM card with Bitrix24 CRM. Make real phone calls and send SMS directly fr om contact, lead, and deal cards. No VoIP provider, no SMS gateway, no per-message fees. Just your existing SIM card and mobile plan.

# WHY SIMtrix: 6 FEATURES NO OTHER APP OFFERS

1. Two-Way SMS on CRM Timeline
   Incoming SMS are saved directly to the contact, lead, or deal card in Bitrix24 as timeline activities. Not just a notification. A full conversation history inside your CRM.
   
2. Smart Caller ID Overlay
   When a call comes in, your phone screen shows a floating overlay with the caller's name, company, current deal, and deal stage pulled live fr om Bitrix24. Know who's calling before you pick up.
   
3. SMS Campaign Queuing with Smart Intervals
   Send bulk SMS campaigns fr om Bitrix24 with automatic queuing. Configurable delay between messages (min 35s), time window scheduling, multi-SIM distribution, and real-time delivery analytics.
   
4. Call Recording That Works on Android
   Most call recording apps stopped working after Android 12 restricted access to call audio. SIMtrix Bridge bypasses these limitations. Record both sides of the conversation and automatically upload recordings to the Bitrix24 activity timeline. Toggle recording on or off per user from the admin panel.
   
5. International Call and SMS Cost Protection
   Define allowed country codes per SIM card to prevent employees from making expensive international calls or sending SMS abroad. Block all numbers outside your approved list. A simple but powerful way to control telecom costs across your team.
   
6. Auto-Create Lead from Unknown Callers
   Every incoming call from an unrecognized number automatically creates a new Lead in Bitrix24 with the phone number attached. No manual entry, no missed opportunities.
   

# CALLS

• One-click outgoing calls from any contact, lead, or deal card
  
• Incoming calls automatically logged to CRM timeline with caller info
  
• Smart Caller ID overlay on your phone screen during incoming calls
  
• Auto-create Lead from unknown incoming numbers
  
• Dual SIM support, choose which SIM card to use
  

# CALL RECORDING

• Full call recording restored on Android 12, 13, 14, and 15 wh ere standard recording apps no longer work
  
• Both sides of the conversation captured in clear audio quality
  
• Automatic upload to Bitrix24 activity timeline after each call
  
• Recordings attached to the matching contact, lead, or deal card
  
• Toggle recording on or off per user from the admin panel
  
• Audio enhancement for improved playback clarity
  
• Listen to or download recordings directly from Bitrix24 CRM
  

# SMS

• Send SMS from contact, lead, or deal card, delivered via your real SIM
  
• Two-way SMS, incoming messages saved directly to CRM contact timeline
  
• No character lim it per message
  
• Incoming SMS matched to existing contacts, leads, and deals automatically
  

# SMS CAMPAIGNS

• Smart queuing engine that respects Android and carrier rate limits so your messages are delivered reliably without being throttled or blocked
  
• Configurable interval between messages (min 35 seconds) to stay within carrier sending policies
  
• Campaign time window scheduling, define start and end hours so SMS are only sent during business hours
  
• Multi-SIM distribution, spread campaign load across multiple phones and SIM cards for higher throughput
  
• Pause, resume, and cancel running campaigns at any time
  
• Real-time campaign analytics: sent, delivered, failed, and pending counters
  
• No per-message fees, use your existing mobile plan allowance
  

# COST PROTECTION

• Define a whitelist of allowed country dialing codes per SIM card
  
• Calls and SMS to numbers outside the approved country list are automatically blocked
  
• Prevent unexpected international charges from employee phones
  
• Set rules per SIM or per team, full flexibility for multi-country organizations
  
• Review blocked attempt logs in the admin panel
  

# ADMIN PANEL (simtrix.app)

• Multi-SIM management, connect multiple phones and SIM cards
  
• Per-user feature control: enable or disable calls, SMS, or recording individually
  
• Country code restrictions for international call and SMS cost control
  
• Bitrix24 user sync, import and assign users to SIM cards
  
• Real-time connection status monitoring for every paired phone
  

# BROWSER EXTENSIONS (Chrome and Firefox)

• Click any phone number on any website to initiate a call via your SIM
  
• Add contacts to Bitrix24 directly from the browser
  

REQUIREMENTS
Bitrix24 cloud plan (any plan with REST API access)
Android phone (Android 8+) with an active SIM card
SIMtrix Bridge Android app (free download from simtrix.app)
Internet connection on both phone and Bitrix24


PRICING
14-day free trial, no credit card required
Plans start at $2.50 per SIM per month
See all plans and features: https://simtrix.app/pricing


TECHNICAL DETAILS
Real-time communication via WebSocket + FCM (zero latency)
Multi-tenant architecture, one account per Bitrix24 portal
Admin panel available in 10 languages (EN, PL, DE, ES, FR, PT-BR, TR, VI, ZH, AR)
GDPR-compliant, SIMtrix acts as a bridge only, no call or SMS content is stored on our servers
Full legal documentation: Terms of Service, Privacy Policy, DPA


SIMtrix is a single unified app. Unlike solutions that require separate installations for calls and SMS, all telephony and messaging features work together in one integration.


For setup guides, FAQs, and support visit: https://simtrix.app