Use APKPure App
Get DST APN old version APK for Android
Displays DST (a Brunei mobile telco) APN settings
Displays APN settings for Intercom and MMS for DSTCom, Brunei
Works with both Postpaid (Prima) and Prepaid (Easi) lines.
Android does not allow apps to set the APN. You will need to do so manually. For full configuration refer to
http://blog.thewheatfield.org/2011/02/25/getting-android-to-play-nice-with-dsts-internet-and-mms-apns/