How can I cancel 'Call Forwarding on Conditional' on my Alcatel Android 7.0 phone?

[Android Central Question]

I have a dual SIM phone which seems to have set itself to forward calls (I know not to where!). I removed the second (overseas) SIM and this seemed to fix it for a short time but it has now reverted and calls cut off after only a couple of rings before I can answer them.

I have tried tapping the phone icon on the main screen, followed by the menu button (three dots at top of screen) and from there Settings (the only option which looked like it might help) but that only leads to a dead end, as do all other options in that sub-section.

I have also Restarted the phone to no avail.

I would be so grateful if someone could help me fix this.

 

[B. Diddy]

Welcome to Android Central! Which Alcatel phone, and which carrier? See if this helps: https://support.t-mobile.com/docs/DOC-33154