Phone not working if incoming and outgoing same time

[ryder203]

Checklist

• I can reproduce the bug with the latest version given here.
• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected app version

1.10.0

Affected Android/Custom ROM version

Android 16 color os oppo

Affected device model

Find x8 ultra

How did you install the app?

F-Droid / IzzyOnDroid

Steps to reproduce the bug

Dial someone - receive call at same time same second - outgoing call not working then (had to re-dial and thought network error, and incoming call is not stored in call list then as it's not coming through

Missed some important calls because of this.

Expected behavior

I can call person, person calling me same time gets occupied signal and incoming call is in call list

Actual behavior

See above

Screenshots/Screen recordings

No response

Additional information

No response

[naveensingh]

Dial someone - receive call at same time same second - outgoing call not working then (had to re-dial and thought network error, and incoming call is not stored in call list then as it's not coming through

• Did you receive the incoming call at the exact moment you dialed a number?
• If the incoming call didn't get through and it wasn't logged in the call logs, how do you know you were called the exact moment you initiated the outgoing call?
• When you say "incoming call didn't get through", what happened on the caller's side?
• Does this simultaneous incoming-outgoing bug also occur in your system dialer app?

[ryder203]

It was like I tried to call my girlfriend at 10:30, but the dialer acted strange and gave no signal, then short signal I never heard before. Tried 3 times and did not establish connection and my mother told me later she tried to call me at exactly 10:30 but got no connection. After 3 times trying to call my girlfriend for some seconds I called a workplace number and got connected. Well, maybe it was just a network error. But I never encountered something like that before and I used fossify only for a short time now. And I got no notification at all that my mother tried to call. She later wrote text messages then.

[naveensingh]

It was probably a network error.

And I got no notification at all that my mother tried to call.

At least on the networks I have tested, incoming calls are rejected immediately with a busy signal on the caller's end, while your outgoing call is still being connected. Those incoming calls can only reach your device once your outgoing call is connected and ongoing, and that would explain what happened here. Also, calls are logged by the system, so a bug in Fossify Phone wouldn't cause a missing call log.

[ryder203]

OK, thanks for the analysis and your work. It is appreciated. Next coffee is on me.