Sketches of the inner regions of an accretion flow around a black hole during the different phases of the outburst. Top right: in the rising hard phase the JED is settled over a large region (R_J is large), leading to efficient magnetic flux accumulation on the black hole. The radio emission arises from a two-component outflow, made of an important BZ spine surrounded by a BP jet. Top left to bottom left: during the soft state there is no more JED, the magnetic field diffuses away, and the BP and BZ jets both disappear. Little or no weak radio emission is expected (jetline). Bottom right: in the decaying phase a JED reappears in the innermost region, and the magnetic field advection becomes efficient again. The magnetic flux on the black hole is still weak, and the BZ spine has little or no impact on the jet dynamics and subsequent radio emission.