Hello,
I want to program my nfc tag to start forwarding calls, With task phone call and *21#1234567890#. This i can actieve, but i can’t use task phone call and #21#, to stop the call forwarding. Had anyone archieved to stop the dall forwarding with nfc tools?
Pretty sure those are two separate actions, is there a way to set it as a toggle?
You could use tasker Tasker - React To NFC Tag - YouTube it’s not as easy to use but I think you can make it do what you want.
Looked more at it and you can do it in nfc tools if you go to tasks and include conditional blocks
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Goodmorning,
Thats exactly whattsapp i have 
The mmi code (Ussd code) for call forwarding is working.
Only the stop code is not working. I get a message: connectionproblem or invalid mmi code.
I use *#21#. When i use this in the phone app. The callforwarding is stopped. So There it works.
So do hou have any ideas?
It might be that * is a special character that needs to be escaped somehow
Hmm, i think so too.
Now the question is how to escape this.
Hello,
I get it working. I make a new contact with the #21#
Then i make a run a shortcut to this new contact,
Then it works.
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Hi! I also want to use a NFC tag to forward all calls, but the trailing “#” disappears as my phone runs the MMI code (so there is an error sound, that this number has not been assigned to a person). I’ve also tried creating a contact with the full code (**21*phone number#), but when my Samsung phone calls that contatct the trailing “#” is still missing. This character is also stored in the tag, so the NFC Tools works fine, but my phone cannot see the last #.
The “clear call forwarding” ##002# MMI code has the same problem.
Is there a way the escape the “#” character?
Any help would be appreciated!
Maybe add another#
I’ve already tried that…no effect…
Odd. What if you start with #? I guess my question is does the # make it through at all or is Samsung filtering it out at some part of the NFC stack?
I can see this being done deliberately “for security” so people don’t tap an NFC tag in the wild and suddenly have their phone settings change in such a way as the person not know what’s happening.
There might be another more annoying approach… use tasker to manage your call forwarding and trigger tasker with an NFC tag.
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This is the approach I feel is the must appropriate.