You may know this but may not know as well.
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Starting from X-SIM Firmware 3.0.7 Fido is fully supported by X-SIM(iOS5.1.1).
Starting from X-SIM Firmware 4.0.0 T-Mobile Germany is fully supported by X-SIM(iOS5.1.1).
Starting from X-SIM Firmware 4.16 Fido iOS 6.x.x & 6.1 is fully supported by X-SIM
Starting from X-SIM Firmware 4.18 Fido Canada and T-mobile Germany iOS 6.x.x & 6.1 is fully supported by X-SIM
Any other solution for it?