Can I use SMS without dealing with carrier integrations?

Yes—sometimes, but it depends on what you mean by “use SMS.”

If you want to send SMS from software/app

You generally do need a provider that has carrier connectivity somewhere in the chain. You usually do not need to integrate with carriers yourself, though. Most people use an SMS API/platform like:

• Twilio
• Vonage
• MessageBird
• Sinch
• Plivo

These providers handle the carrier relationships and give you an API instead of making you work directly with each mobile carrier.

If you want true “no carrier integration at all”

Your options are limited:

• Device-to-device SMS: You can just use a phone and send texts normally.
• Email-to-SMS gateways: In some regions/carriers, you can email a phone number, but this is unreliable and carrier-specific.
• SIM/modem hardware: You can send SMS through a physical device with a SIM card, but that still uses carrier service behind the scenes.

Important caveat

If your goal is things like:

• bulk messaging
• OTP/2FA
• marketing texts
• automated reminders

then you will almost always need a third-party SMS platform and must comply with carrier and regulatory rules (opt-in, sender registration, etc.).

Short answer

• For normal personal texting: yes, no integration needed.
• For app/business SMS: you usually avoid direct carrier integrations by using an SMS provider, but you still rely on carrier networks indirectly.

If you tell me your use case, I can recommend the simplest approach.