Originally Posted by oscar786
You have to have custom ROM for the straight talk MMS to work, but If do not want custom ROM, you have to be rooted, you can modify apn settings in System, and MMS will work. this is what you have to do.
Ist enter apn for straight talk, as given all over the web.
Second you have to have HTC M8 rooted, second get SQ Lite Editor from the app store (you have to buy it), after install open sqlite editor open Files tab/data/data/com.android.providers.telephony/databases/telephony.db and open carriers. Delete all carriers that are listed in them including at&t, but leave only Straight talk you have entered in apn setting earlier. Exit SQLite by going backward using back arrow. Reboot phone and you will having data and working mms on Straight Talk using at&t SIM.
I had used this method on HTC M8 (at&t variant) and LG Flex (at&t variant)
I still cant get MMS to work. Here is my story. (in every step I try numerous APN setting configurations
1. old phone - Samsung Galaxy Skyrocket (LTE, SMS and MMS all worked). Running stock AT&T OS......I think it was 4.1. I also purchased a mini-SIM card from straight talk for LTE support. I used a sim cutter on this same card and then installed in my new HTC M8.
2. New phone - HTC One M8.......Locked AT&T phone running stock kit kat . LTE and SMS work fine. Still cant get MMS working
3. Rooted the HTC One M8. MMS is still not working
4. Installed SQLite and removed all the entries (except straight talk) from the telephony database. Rebooted phone. Only straight talk shows up under APN Names. Yet still not working for MMS. Tried numerous different settings and still cant get MMS working.
I really dont want to install a custom ROM. I have a rooted AT&T HTC M8 running stock kitkat. Can anyone please help me?????
I also tried calling straight talk for tech support. It was the typical support. He wants me to reboot the phone. The support person mentioned that MMS is not guaranteed in the bring your own phone program.......he was not invested in trying to resolve the problem.