Bulk SMS Campaigns from Bitrix24 — Through Your Real SIM Card
Queue hundreds of SMS messages from Bitrix24 and deliver them one by one through your Android phone — with smart intervals that bypass Android rate limits, configurable send windows, and multi-phone distribution.
Enterprise SMS Campaigns Without a Gateway
Send bulk SMS through physical SIM cards — smart queuing, business-hours delivery, and real-time analytics included.
Smart Queue with Android Rate Limit Bypass
Android blocks apps that try to send too many SMS messages at once. SIMtrix solves this by queuing all messages server-side and dispatching them one at a time at configurable intervals — typically 35 seconds or more between messages. This keeps you within Android's rate limits while still delivering hundreds of messages per campaign. The queue runs on BullMQ with Redis, ensuring reliability even during server restarts.
Send Windows & Business-Hours Delivery
Define exactly when SMS messages should be delivered. Set a send window like 9:00-18:00 Monday through Friday, and SIMtrix will only dispatch messages during those hours. If the queue is not finished by the end of the window, remaining messages are held and continue the next business day. Your recipients never get messages at 2 AM.
Multi-Phone Distribution & Round-Robin
Connect multiple Android phones and SIMtrix distributes campaign messages across them using round-robin scheduling. If one phone goes offline, messages are automatically rerouted to the remaining phones. This increases throughput — with 3 phones at 35-second intervals, you send approximately 100 messages per hour instead of 35. Real-time analytics show delivery progress per phone.
How It Works
From Bitrix24 campaign to delivered SMS — fully automated.
Create Campaign in Bitrix24
Build your SMS campaign in Bitrix24 with a recipient list and message template. Use CRM segments to target specific leads, contacts, or deals. SIMtrix is registered as the SMS provider.
Messages Queued Server-Side
SIMtrix receives the batch and queues all messages with the configured interval (35s+) and send window. The queue status is visible in the SIMtrix admin panel in real time.
Dispatched One by One to Phones
Messages are dispatched individually to connected Android phones, respecting rate limits and business hours. If multiple phones are connected, round-robin distribution balances the load.
Delivery Tracked in Bitrix24
Each phone sends the SMS through its SIM card. Delivery status (sent, delivered, failed) is tracked and synced back to Bitrix24 in real time. Campaign analytics show success rates, timing, and per-phone statistics.
Who Is This For?
SMS campaigns are valuable for any team that needs to reach many contacts through their real phone number.
Marketing Teams
Run promotional campaigns, event invitations, and product announcements through your company's real mobile numbers. Recipients see a local number they recognize — not a generic short code. Response rates improve significantly.
Sales Operations
Send follow-up SMS to all leads from a trade show, webinar, or campaign. Personalize each message with CRM data — name, company, deal stage. All responses are captured on the CRM timeline automatically.
Service & Appointment Teams
Send appointment reminders, service confirmations, and feedback requests in bulk. Configure send windows so customers receive messages during business hours. Reduce no-shows by 30-40% with timely reminders.
Related Features
Explore more SIMtrix capabilities that work seamlessly together.
Frequently Asked Questions
There is no hard limit on campaign size. SIMtrix queues all messages and delivers them at the configured interval. A campaign of 500 messages at 35-second intervals takes approximately 5 hours with one phone, or under 2 hours with three phones. The queue runs reliably across days if needed.
SIMtrix's 35-second minimum interval was specifically chosen to stay well within carrier rate limits. At this pace, you send about 100 messages per hour per SIM — which looks like normal human texting to the carrier. We recommend checking your carrier's fair-use policy for your specific plan.
Yes. Bitrix24's campaign tools support merge fields — insert contact name, company, deal value, or any CRM field into the message template. Each recipient gets a personalized message. SIMtrix delivers them exactly as Bitrix24 generates them.
Launch your first SMS campaign today
Real SIM card delivery. Smart queuing. No gateway fees.
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