Transfer au Galaxy S9+ to Rakuten Mobile (UN-LIMIT) with MNP [Sim/ APN settings of Android terminals also explained]

Rakuten Mobile's campaign "The first 3 million people are free for one year" was caught, and au's Galaxy S9+ was changed from cheap SIM Mineo to Rakuten Mobile with MNP. Sim/APN settings for using Android smartphones on Rakuten Mobile will also be explained.