Hello
Does anybody know how to change the not in service message such as vodafone's into a busy signal?
Wikipedia says its possible:
Variations and enhancementsIn almost any case, a telephone switch may be programmed to return a slow or fast busy signal instead of an intercept message. Intercept messages also often end with a coded identifier signifying which switch the message is being played by; this can be useful for diagnosing network problems.
cheer cheer