5.1.1 to 6.1.2 with tinyumbrella shsh preserving baseband iphone 4 (gsm)

Please help me to upgrade iphone 4 to 6.1.2, i have shsh saved before with tinyumbrella, my iphone is not sim-free, but i have gevey sim baseband 4.10.01 please send me exact instructions.. Thanks

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