ekit dual number [US & UK] SIMs

[inquisitor]

I don't have a dual IMSI from Telstial, but one from a German MVNO (solomo/vistream, who have their own MNC, but use a second IMSI from a MNO (eplus) for international roaming) and maybe Telestial's SIM is working the same way.
So with solomo the PIN itself has generally 4 digits. By prefixing 1 or 2 one can change the IMSI. If only the 4-digit-PIN is entered, the last used IMSI will be activated. The PIN can be changed in the usual way: enter the old 4-digit-PIN and thereafter a new one. Any change will apply for both IMSIs.