There’s even built-in SMS scheduling, quick replies, improved group messaging, SMS blocking, and more. The app offers a slew of customization options with various theme colors, notifications, and per-contact settings. So, I can only assume at this point that there was something in the last Android security update that broke this for 3rd party apps.A long-time favorite, Textra for PC is a clean-looking SMS app with plenty of features for hardcore users. I tried *920 a couple of times again and it didn't help. Verizon had me dial *920, the rep said that they had seen cases where 'call forward on busy' (which *920 turns off) would prevent MMS from going through, and after I turned it off I was able to send a pic to myself and got it immediately, but the next morning I was back to not being able to send/receive MMS via Textra.

I've tried disabling everything I can possibly disable on the stock app to prevent the stock app from 'hijacking' the MMS incoming/outgoing, I've disabled all the power management, cleared cache, uninstall/reinstall Textra, resync, everything. I have tried a couple of other third-party text apps and the exact same issue, MMS will not send at all or is delayed for hours. I can send/receive MMS in the stock Messenger just fine but Textra will fail (Timeout: Can't get MMS) or send the message several hours later whereas the stock app goes through instantly. I have been back and forth with Verizon and with Textra about this and unfortunately it looks like (at least in my case) it is Android that is causing the issue. On current version I do not see Legacy or System options in Settings.

Textra desktop