MMS可以加上圖片/GIF/影片檔案的推廣長短訊，以及加入emoji符號，而SMS則允許您發送大約 150 字 – 200 字的短消息。

MMS can add promotional text messages with pictures/GIF/video files and add emoji symbols, while SMS allows you to send short messages of approximately 150 – 200 words.

雖然一則MMS會比一則SMS價格高，但由於MMS字數不受限制，如果推廣文案較多的短訊時，使用MMS服務相對比較實惠。留意MMS必須另外登記MMS Sender ID，而需時數天，所以務必在發送日子前向MarketHK查詢及預約。

Although an MMS will be more expensive than an SMS, since the number of words in an MMS is not limited, it is relatively more affordable to use the MMS service if you are promoting text messages with a lot of copy. Please note that MMS must register an MMS Sender ID separately, which takes several days, so be sure to check with MarketHK and make a reservation before the sending date.

SMS: 150 – 200 文字

MMS:

• 圖像為 JPG 格式，動畫為 GIF 格式，並要垂直設計以符合大多數手機和平板電腦的垂直顯示
• 圖像及動畫文件大小不得超過 200 KB
• 圖像的最佳尺寸是 327 像素（高度）和 400 像素（寬度）
• 圖像的分辨率應為 72 像素
• 為提高可讀性，文字內容應少於 400 個字元

SMS: 150 – 200 text

MMS:

• Images should be in JPG format, animations should be in GIF format, and designed vertically to match the vertical display of most phones and tablets
• Image and animation file size must not exceed 200 KB
• The optimal size for the image is 327 pixels (height) and 400 pixels (width)
• Image resolution should be 72 pixels
• To improve readability, text content should be less than 400 characters