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Browse articles, guides, and FAQs to get the most out of 312VOIP & Text.

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Getting Started

Account setup, adding phone numbers, and sending your first message.

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Billing & Plans

Pricing plans, balance top-ups, payment methods, and invoices.

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Compliance & TCPA

10DLC registration, opt-in/opt-out rules, and SMS best practices.

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Mass Campaigns

Creating campaigns, scheduling, managing lists, and reading reports.

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10DLC Registration

Brand registration, campaign approval, and carrier requirements.

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Frequently Asked Questions

Quick answers to the most common questions.

How do I create an account? +
Visit portal.312voip.com/signup and complete the sign-up wizard. You'll enter your company details, register your brand for 10DLC compliance, and choose a plan. The Trial plan is free with no credit card required and includes your first 100 messages.
How do I add a phone number? +
After logging in, go to Phone Numbers in the left sidebar and click Add Number. You can search for available local numbers by area code. Numbers are powered by Telnyx and are 10DLC registered for business SMS.
How do I import contacts? +
Navigate to Contacts and click Import CSV. Your file should have columns for name and phone number (E.164 format: +13125550100 is recommended). Duplicates are automatically detected and skipped. You can also add contacts manually one at a time.
What happens when my balance runs low? +
If you have a payment card on file and auto-recharge enabled, your balance will automatically top up when it drops below your threshold. You'll also receive an email alert. You can configure the threshold and recharge amount in Settings → Billing.
Can I cancel or change my plan at any time? +
Yes. You can upgrade, downgrade, or cancel your plan from Settings → Billing at any time. There are no long-term contracts or cancellation fees. If you cancel, your account remains active until the end of the billing period.
How do I reset my password? +
Click Forgot password? on the login page at portal.312voip.com/login. Enter the email address associated with your account and we'll send a reset link. The link expires after 1 hour.
How do I enable two-factor authentication (MFA)? +
Go to Settings → Security and click Enable Two-Factor Authentication. Scan the QR code with an authenticator app (Google Authenticator, Authy, etc.) and enter the 6-digit code to confirm. MFA is highly recommended for all admin accounts.
How do I send a mass campaign? +
Navigate to Campaigns and click New Campaign. Select your contact list (or individual contacts), choose your sender number, write your message, and either send immediately or schedule for a future date and time. Delivery reports are available in real time.
What is the difference between SMS and MMS? +
SMS (Short Message Service) is plain text, up to 160 characters per segment. MMS (Multimedia Messaging Service) allows you to attach images, GIFs, and other media. MMS messages cost slightly more per send. Both are supported on all 312VOIP plans.
How does opt-out handling work? +
When a contact replies STOP, UNSUBSCRIBE, CANCEL, END, or QUIT, they are automatically opted out and will not receive further messages from your number. When they reply START or UNSTOP, they are re-opted in. These keywords are handled automatically and cannot be overridden — this is a carrier and TCPA compliance requirement.
Compliance & 10DLC

Everything you need to know about sending compliant business SMS.

What is 10DLC?

10DLC (10-Digit Long Code) is the standard for business SMS in the United States. All carriers require businesses to register their brand and messaging campaigns before sending at scale. Without registration, messages are heavily filtered or blocked.

312VOIP handles 10DLC registration for you during the sign-up process. You provide your business details and use case — we submit the registration to The Campaign Registry (TCR) on your behalf.

What is TCPA?

The Telephone Consumer Protection Act (TCPA) regulates commercial SMS in the US. Key requirements:

  • Obtain written consent before messaging contacts
  • Honor STOP requests immediately and permanently
  • Include your business name in the first message
  • Include opt-out instructions (e.g. "Reply STOP to unsubscribe")
  • Only send during reasonable hours (8 AM – 9 PM recipient local time)

Required Opt-In Language

Your first message to a new contact should include:

  • Your business name
  • Message frequency (e.g. "Msg frequency varies")
  • Opt-out instructions ("Reply STOP to unsubscribe")
  • HELP instructions ("Reply HELP for help")
  • Carrier disclaimer ("Msg & data rates may apply")

Example: "Hi! This is Acme Dental. Msg frequency varies. Msg & data rates may apply. Reply STOP to unsubscribe, HELP for help."

Carrier Filtering

Carriers use automated filters to detect spam. To maintain high deliverability:

  • Do not send the same message repeatedly to large lists
  • Avoid URL shorteners (bit.ly, tinyurl) — use your own domain
  • Avoid ALL CAPS messages
  • Don't send to purchased or unverified lists
  • Keep opt-out rates low by messaging relevant contacts

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