Samsung s5830 mobile phone system file MMS.apk has been deleted. How to recover it?

Since you can delete system files, your mobile phone has been rooted. You can download a short message application and look for it in 9 1 assistant. . Then use the re file manager to move the downloaded apk program to the system-app in the directory of mobile phone (not memory card or mass storage), and then check the same permissions as other system applications under the attribute of that apk file. . The principle is to replace the original SMS software with a third-party SMS software.