MMS messages are routed through Carrier Gateways (MMSC) in order to reach a mobile subscriber’s mobile device. Each carrier gateway has a maximum size per message and this maximum size varies across carriers. Additionally, each mobile phone has a size limitation per message. Therefore, the MMS file size limitation will depend on both the destination phone and carrier network. Thus, we provide an MMS content transcoding service to optimize the size of your MMS content before it is delivered. Our system automatically resizes your MMS content and optimizes it based on the mobile device and carrier gateway limitations. Without this transcoding service, MMS deliverability issues may occur when attempting to send content that is too large for the recipient’s mobile network.
Nearly all mobile devices launched over the past 5 years have displays in portrait mode. Therefore, we recommend mobile content to be optimized for a vertical layout. MMS Images should be sized as a portrait (ie taller) or as a square. With regards to widescreen MMS images, people are not accustomed to twisting their phones to view a picture in full-screen mode like they typically would for a video. MMS Videos work well as widescreen or portrait depending on the content. While the widescreen mode is standard for a TV/Movie video, Portrait mode is able to use the space more effectively and show a larger video area in the message thread. Therefore, it will be easier to watch the video and add readable text to the video.
Content of Interest Area
MMS messages are delivered to the device’s messaging app and display inside a preview bubble. The preview bubble often cuts off parts of the image or video content on the top and sides. Some messaging apps may also overlay controls over the top and bottom of the image or video once it is expanded. Therefore, any content of interest should be kept in the areas displayed on the preview bubble without having to open the content full screen.
Download Template: MMS Best Practices PSD File
We recommend keeping MMS images files under 720Kb. If you send an image higher than this Skycore will transcode it to a size that is better supported by MMS enabled mobile networks.
We perform frequent tests to determine the best dimension size. Our most recent tests brought us to the conclusion that the optimal image size across all devices has an aspect ratio of 9:16 and a size 1080px wide by 1920px high. While the optimal image size is 1080px wide by 1920px high, we also conducted some tests to determine the minimum requirement. We concluded that an image should be at least 480px by 480px to avoid blurry preview images.
1080px wide by 1920px tall: Avoid adding content of interest (eg important text) on the top 250px and the bottom 250px.
480px by 480px: Avoid placing the content of interest in the 39px at the top, right, and bottom of the gif. Also, avoid adding such content in the 43x on the left side of the image.
Example GIF Dimensions: 480px by 480px
We advise you to use a gif file under 600 KB. If you send an animated gif image higher than this, Skycore will attempt to transcode it to a size that is better supported by MMS enabled mobile networks.
When creating your animated gif, the dimensions are an important factor when considering size. We recommend using either square content or portrait mode content. We do not recommend creating animated gif images that extend to the top and bottom edges of the screen because these spaces may be covered up anyway by the preview bubble or navigation controls. By limiting the animated gif to the areas of interest, you will be able to use more animation slides or more colors in your image.
Recommended Dimensions (Portrait/Vertical)480px wide by 720px tall (low animation)480px wide by 640px tall (high animation)
Recommended Dimensions (Square)640px wide by 640px tall (low animation)480px wide by 480px tall (high animation)
480px by 720px: Avoid placing the content of interest in the 39px at the top, right, and bottom of the gif. Also, avoid adding such content in the 44px on the left side of the gif.480px by 640px: Avoid placing content of interest in the 65px at the top, and the 58px at the bottom of the gif. Also, avoid the 39px to each side of the gif.640px by 640px: Avoid placing the content of interest in the 52px at the top, right, and bottom of the gif. Also, avoid adding content in the 58px on the left side of the gif.480px by 480px: Avoid placing the content of interest in the 39px at the top, right, and bottom of the gif. Also, avoid adding such content in the 43x on the left side of the gif.
When decreasing the file size, you want to make sure that you are not decreasing the quality. Blurry animated images will not leave a good impression on your customers. Here are a few tips to keep the file size down without hurting the quality of the animation.
*An animated gif is a .gif image file composed of multiple images that play on a loop. Unlike videos, animated gif files do not include sound and do not require the viewer to press play.
We recommend keeping MMS video source files under 20Mb if you are using Skycore video transcoding services. You can submit your source video with a frame rate of 30 FPS and bitrate of 1-5mbps. Skycore will transcode video files from 500Kb to 1.2Mb. We recommend keeping your MMS video files under 720Kb if you are not using Skycore transcoding.
The duration of a video will have the most dramatic effect on the quality and resulting file size of the MMS. Videos 15 seconds and under will be delivered in HD quality to nearly all carriers and most phones. Videos under 20 seconds will be delivered in HD quality to most carriers and most phones. Videos over 20 seconds will vary in quality depending on the network and mobile device. The characteristics of your video will also impact the quality such as whether there is music or fast movements.
Landscape (Horizontal)1280px by 720px
Portrait (Vertical)720px by 1280px
The video preview thumbnail is the frame the end user sees before they click play. If the video preview thumbnail is not attractive or clear, recipients may not open or click the video in the MMS. Therefore, it is important to have control over what you want to show in the video preview thumbnail.
Different Android devices receiving videos via MMS may show different frames for their video preview thumbnails. We tested multiple videos in different lengths with some Android phones. Also, we tested videos of the same length to see if the results would be consistent. We tested this by sending videos with different video time duration to several Android devices. The results as shown in the screenshot indicate that:
In conclusion, the results did not show any clear consistencies regarding video thumbnail previews. Since Samsung is one of the most used Android devices and it consistently shows the preview at 0:15 seconds, we recommend that you show an eye-catching video frame at 0:15. If the video is shorter than 15 seconds, then have the eye-catching video frame at 0:06~0:07.
Unlike Android devices, iOS devices consistently display the very first video frame as the preview thumbnail for MMS videos. Therefore, we recommend that you show an important slide at the beginning of the video.
When you’re sending an MMS with a video, we recommend that you show a clear and attractive video frame at the beginning (0:00-0:01), at and at 0:15 (or 0:06-0:07 if the video is shorter).
You can improve the quality of your video by using the following techniques: