Send MMS Campaigns From a PC Without a Cloud Account
Picture messages, GIFs and short videos sent from a Windows PC through an Android phone or an MMS-capable modem. The carrier bills the SIM; you do not pay per message.
What MMS adds to plain SMS
SMS carries text. MMS carries a multimedia part: a photo, a GIF or a few seconds of video, sometimes with text and a subject line. Recipients see it in their normal messaging app, not in a browser.
Media in the message
One image, GIF or video per message, plus optional text and a subject line. No link shortener, no landing page required.
Phone or modem
An Android phone is the most reliable MMS channel today. Some MMS-capable modems work, but carrier support varies by country.
Billed by the carrier
The license is paid once. Each MMS is charged by your mobile plan, exactly as it would be if you sent it by hand.
The hardware reality
MMS is the part of the stack where carriers differ most. Read this before buying an Ultimate license.
Most USB modems cannot send MMS
Many carriers block MMS from USB modems or require an MMS APN and a WAP gateway that the modem firmware does not expose. An Android phone with the gateway app is the safer route, because the phone's own messaging stack already knows the carrier settings.
| Channel | MMS support | Why |
|---|---|---|
| Android phone (recommended) | Usually works | Uses the phone's carrier-configured MMS stack |
| MMS-capable modem | Depends on carrier | Requires MMS APN and firmware support; often blocked |
| 4G modem in ethernet mode | Not supported | No AT command port, so no message control |
Tested 2026-11. Carrier rules change; confirm with your operator before a large MMS campaign.
File size and format limits
300 KB is the safe common denominator across carriers. Larger files are usually compressed or rejected by the network.
| Media | Recommended | Practical limit | Note |
|---|---|---|---|
| JPEG or PNG image | 1200 px long edge | 300 KB | Compress to 70–80% quality |
| GIF | 480 px wide | 300 KB | Fewer frames send faster |
| MP4 video | 5–10 seconds | 300 KB | Lower the resolution before lowering the duration |
Send one MMS: Android phone or GSM modem
Two paths, and the phone is the one that usually works. Send one message to your own number before a campaign.
Path A — Android phone
Install the gateway app
Download mymobkit.apk on the phone and set the app as the default SMS app. Expected: the app holds the SMS role and its local panel opens. Full steps: Android gateway install.
Connect the PC to the phone
Put both on the same Wi-Fi, on USB, or on a VPN. Open the phone's panel from the PC. Expected: the IP and port load in a browser.
Add the phone as a device
Run Phone Detector in SMS Deliverer and add the phone's address. Expected: the device shows online with a signal reading.
Compose and send
Attach one image, GIF or short MP4 under 300 KB, add text and a subject if needed, and send to your own number. Expected: the compose dialog shows the attachment, and a delivery report arrives. MMS reports are slower than SMS — allow a few minutes.
Path B — GSM modem
Install the modem and its driver
Connect the modem and confirm it appears under Modems in Device Manager. Expected: no unknown device, and a COM port exists.
Add it in Phone Detector
Select the modem and add it as a device. Expected: it appears in the device list. If the firmware has no MMS support, it is listed as SMS-only or rejected.
Choose the carrier profile
When the detector asks for a country and carrier, select the profile for the SIM in the modem. Expected: the profile is accepted. If no profile is offered, or the carrier blocks MMS from modems, stop and use a phone.
Send one test MMS
Expected: the network accepts the message and the report records the carrier result. A rejected message is a carrier or firmware limit, not a setting to keep retrying.
Build and send a campaign
Prepare the media
Resize the file below your carrier's limit, then add it to the media library once so every campaign reuses the same file.
Select recipients
Import a CSV or use the phone book. Apply the opt-out list before anything is queued.
Choose the phone
Pick the Android device that owns the MMS-capable SIM. If you have more than one, split the list by device.
Send and watch the report
MMS delivery reports are slower than SMS. Allow a few minutes before judging a failure.
Capability and limits
Supports
Image, GIF and short MP4 video via an Android phone or a carrier-supported MMS modem; text plus subject line.
Not supported
No RCS, no WhatsApp or Viber delivery, no guarantee that a carrier will accept MMS from a modem.
Depends on
Carrier MMS policy, APN configuration, file size and the phone's Android version.
Questions buyers ask
Why does my carrier reject MMS from a modem?
Many operators only allow MMS from a phone whose IMEI and APN they recognise. This is a carrier policy, not a software setting, and it is why we recommend an Android phone for MMS.
What file size should I use?
Aim for 300 KB or less. That is the most common accepted size across networks; larger files are often compressed by the carrier or rejected outright.
Can the same campaign send SMS and MMS?
Yes. You can fall back to SMS for recipients whose device or carrier cannot accept MMS, using a separate SMS template.
Does MMS require the Ultimate edition?
Yes. MMS is an Ultimate feature because it needs the media pipeline and the phone-channel module. SMS works in every edition.
How long does an MMS delivery report take?
Usually seconds to a few minutes, and slower than SMS. The report arrives when the carrier's MMSC confirms the retrieval, so do not treat a slow report as a failure.