My AOS was approved without the NOA2 copy too. In lieu of the I-797 approval notice (NOA2), I submitted - National Visa Center letter,stated that the I-129F was approved and that the petition will be forwarded to the consulate. - Infopass letter & the USCIS computer print out(by the local USCIS officer) shown the I-129F petition was approved. - US Consulate processing K1 visa letter - my K1 visa stamp & I-94 entry stamp - USCIS website case status online print out, showing the I-