Removal of Call forwarding [answered]

Thanks for help. I didn't know that these codes still work.

As long as the protocol our phones are using are still GSM descendents, some of these codes will always work, unless some operator decides to disable them on their network :)

What you are discussing about are so called "Supplementary services" and the way of invoking them, UI menu vs. star-hash codes entered viaphone app, is a matter of device user interface. Supplementary services are widely used "legacy services" and the service feature code interface dates back even to non-ui telephone devices. They are commonly used e.g. by certain device certification processes, and if user needs more detailed control to the specific supplementary service.

Please do notice that the service codes and a user friendly graphical UI typically are handled separately by devices on the UI level, but after parsing and handing over to lower levels of the mobile OS they go via the same interaces and modem does not differentiate between them.

@thenakka I see no problem between the solution I propose, and your remarks. The problem here is the lack of completeness of the UI (regarding the supplementary services), and a lost memory of an activated service, by the UI.

In sum, the codes always give you more control