Launch android secret code via B4A App

Question

How can i launch ##xxxx## code with B4A?

Here is my code:

Dim st,stt As String
Dim su As StringUtils
Dim ph As Intent

st = "#"
stt = su.EncodeUrl(st,"UTF8")
Dim ussd As String = "*"&stt&"3646633"&stt&"*"stt&"*"
ph.Initialize(ph.ACTION_CALL,"tel:"&ussd)
StartActivity(ph)

After launching the app, it only showed the dialer. I want to launch engineering mode directly.

Answer 1

You can't. ANdroid does not support USSD codes. There's ways to do it on certain models of phones, but nothing that's universal. USSD should be avoided anyway, its a legacy technology that was meant for the world before data plans.