This talk is devoted to the spectral analysis of 2D Schrödinger operators with inhomogeneous magnetic field. When the magnetic field has two symmetric minima, we expect tunneling to happen: the two smallest eigenvalues are exponentially close to each other in the semiclassical limit. We prove this result in the case of radially symmetric wells. Based on the Helffer-Sjöstrand theory, we obtain an elegant and short proof. This is the first tunneling result between purely magnetic wells, and the non-radial situation is still challenging.