The following sequence
Android 12 ( 62.1.A.0.617, newflasher) => SFOS (Mobile data ok till self broken) => same android 12 (newflasher) => SFOS
brought the mobile data back in SFOS. It worked fine starting with 1st SFOS boot, survived several reboots. I had no WIFI configured during this time. Then after a while it stopped - see below.
(I mention the sequence because I also tried
Android 11 => SFOS (mobile data broken) => Android 11 with EMMA (mobile data ok) => SFOS - but that did not get Mobile data back)
In all cases the phone shows 4G connection, with data “enabled”. The data symbols in the status are ok (they don’t display unless data truly works).
So: after reflashing, it worked ok until rebooting the day after => then back to the repeated
Unexpected data call status 4100 from ofonod with no mobile data.
It ceased working a bit before taking off so left it like that => after landing, surprise! It started working just fine once abroad with roaming enabled (4G, Vodafone RO).
At some point it auto switched to Orange RO, worked a while then got stuck in 3G with the same error. I could force it back to Vodafone RO - and it kept working ever since.
I will try to structure a bug report - but aside telling that in some circumstance it reliably breaks itself, I don’t know what to describe. I can provide ofono/system logs as well.
As opposed to other reports:
- it works ok starting with boot (while it lasts) with Dual IP (default settings)
- Once broken, switching slots, IP setup, etc - won’t help
- VoLTE is NOT activated so no interference.