Short answer: To send bulk SMS through GoHighLevel with VoidFix, connect an Android phone with a SIM, add the VoidFix app to your GHL sub-account, paste your API key and pick VoidFix Solution as the SMS provider. Workflows and bulk actions then text from your own number on a flat monthly plan instead of per-text billing.
GoHighLevel bulk SMS is one of the most useful things an agency can run. The default sending route, though, comes with A2P 10DLC registration and a usage bill that grows with every contact you text. Connecting GHL to a SIM-based gateway changes both.
This guide shows how to send bulk SMS through GoHighLevel using VoidFix Gateway, from connection to first campaign. It also covers the carrier rules that still apply, so you can decide whether the SIM route suits your clients.
Why do agencies look beyond the default GoHighLevel SMS route?
GoHighLevel workflows can text leads automatically, nurture pipelines and broadcast offers to whole lists. The friction usually sits in the SMS plumbing underneath, and it shows up in two places.
The first is A2P 10DLC registration. HighLevel's own A2P campaign registration guide explains that campaign registration follows brand registration, and an approved campaign must be linked to your number before SMS can use the A2P route. Brands and campaigns are recorded with The Campaign Registry, so every client brand goes through the same queue.
The second is usage billing. On Twilio's US SMS pricing page, an outbound long-code text costs $0.0083 per segment, plus a carrier fee of $0.0035 to $0.005 per message and $1.15 a month per number (as of October 2026). Twilio's A2P 10DLC fee list adds a one-time $15 campaign vetting fee and monthly campaign fees of $1.50 to $10. For one business that is manageable. Across many client sub-accounts, it adds up.
How does the VoidFix SIM route compare with LC Phone or Twilio?
VoidFix sends from real SIMs in Android phones instead of virtual numbers rented from a messaging provider. Here is how the two routes differ for GHL texting.
| Registered 10DLC route (LC Phone or Twilio) | VoidFix SIM route | |
|---|---|---|
| Sending number | Virtual 10-digit number rented from the provider | Your own SIM in an Android phone |
| Registration | A2P 10DLC brand and campaign registration before US sending | No 10DLC registration; carrier rules and consent still apply |
| Cost model | Per segment, plus carrier fees, number rental and campaign fees | Flat plan from $49/mo, plus the SIM plan in each phone |
| Volume per number | Throughput set by your registration and trust score | Limited by each SIM plan's fair-use terms; spread load with the Number Pool |
| Replies in GHL Conversations | Yes | Yes |
| Good fit for | Very high volume per number, short codes, senders who want a registered route | Agencies that want flat costs and conversational texting from local numbers |
Sources: HighLevel's A2P registration guide and Twilio's US SMS pricing and A2P 10DLC fee pages, as of October 2026. VoidFix figures are from our SMS pricing page.
How do you connect GoHighLevel to VoidFix?
You do not need a developer. Before you start, connect your Android phone to VoidFix by following the device connection guide. Then:
- Open the VoidFix GHL page. Go to sms.voidfix.com/ghl.html, click Connect to HighLevel and choose the GHL account or sub-account.
- Copy your API key. In the SMS portal, open API in the left menu and copy the key.
- Save your numbers. Paste the API key, add your default inbound and outbound numbers (for example +1XXXXXXXXXX) and click Add/Update.
- Pick VoidFix as the provider. In GoHighLevel, open the sub-account, then Settings, Phone Numbers, Advanced Settings, and select VoidFix Solution.
- Send a test. Text one test contact from GHL Conversations and confirm it arrives from your SIM number. Reply to it and check the reply lands in Conversations.
From then on, SMS and MMS from GHL workflows and Conversations go out through your SIM. For screenshots of every click, follow our GoHighLevel integration documentation.
How do you send a bulk SMS campaign from GHL?
Triggered messages suit follow-ups. Bulk campaigns are where flat pricing makes the biggest difference. To send an offer or announcement to a whole segment:
- Segment your list in GHL. Use smart lists or tags to choose who receives the campaign, and confirm every contact opted in.
- Create a bulk action or workflow. Tag the segment so each contact enters a workflow with an SMS step.
- Pace the send. Spread the campaign over a sensible window instead of firing thousands at once. Turn on Number Warmup for new SIMs, use Spintax so messages are not identical, and share the load across SIMs with the Number Pool.
- Capture replies. Replies flow back into GHL, so conversations, opt-outs and hot leads all land in your pipeline.
What rules still apply when you send without 10DLC registration?
Sending from your own SIM is a person-to-person route, so 10DLC registration is not part of the setup. That makes it a different route, not an exemption. CTIA's Messaging Principles and Best Practices treat any message a business sends as Non-Consumer traffic, whatever route it takes. Carriers can still filter or suspend lines that send high volumes or unsolicited texts. Many consumer SIM plans also limit commercial bulk use, so check your plan's fair-use terms.
GoHighLevel gives you the tools to stay on the right side of those rules:
- Collect clear opt-in before adding anyone to an SMS audience, and keep a record of consent on the contact.
- Honor opt-outs at once by capturing STOP replies and suppressing those contacts automatically.
- Identify yourself in every message so recipients know who is texting.
- Send at sensible hours and avoid over-messaging, which protects both reputation and reply rates.
Our SMS compliance guide covers consent and quiet hours in more detail.
What do agencies gain at scale?
For agencies running GoHighLevel for many clients, the change is bigger. You can onboard a new client and start texting from their own number once their phone is connected, without a brand registration queue. VoidFix includes unlimited sub-accounts, so each client keeps its own numbers and inbox.
Flat pricing also makes SMS easy to package into retainers, with no per-message reconciliation at the end of the month. If you want the background on what registration involves, read our explainer on A2P 10DLC registration.
Frequently asked questions
Do I need A2P 10DLC registration to text from GoHighLevel with VoidFix?
10DLC registration is not part of the setup, because texts go out from the SIM in your own Android phone rather than a registered 10DLC number. Carrier rules still apply. Carriers can filter or suspend lines that send high volumes or unsolicited texts, and you still need consent and a working opt-out.
Do replies show up in GoHighLevel Conversations?
Yes. Once VoidFix Solution is the sub-account's SMS provider, replies travel back from the phone and appear in GHL Conversations, where your workflows can act on them.
Can I use more than one SIM on one GHL sub-account?
Yes. The Number Pool feature connects several SIMs to one sub-account and spreads sending across them, which keeps the volume on each line lower.
How much does GoHighLevel bulk SMS cost with VoidFix?
Paid SMS plans are $49/mo (Lite, 5 devices), $99/mo (Starter, 20 devices) and $199/mo (Professional, 50 devices), with unlimited SMS. You also pay for the SIM plan in each phone. The 7-day free trial does not include integrations, so connect GHL on a paid plan.
Bulk SMS in GHL from your own numbers
GoHighLevel is already a strong engine for outreach. Pairing it with VoidFix Gateway lets you send bulk SMS from real numbers at a flat, predictable cost, without a 10DLC registration queue for every client. Agencies can save up to 80% on messaging costs compared with per-text billing, as long as they keep consent, opt-outs and sending pace in good shape. Ready to connect them? Start your free 7-day trial, or contact our team to walk through your GoHighLevel setup.
