Download latest Android 4.2.1 Jelly Bean firmware with Lollipop Flavour for Amoi A920W smartphone from here or here. Download another Amoi firmware from here.
Archive name: AMOI A920w 4.2.1 fw Lollipop flavour
Image: signed_3878_a920w_lollipop.zip
Archive file size: 221 MB
Support: Mediatek MT6589T
Build number: a920w-user 4.2.1 JOP40D eng.liandc.1388110950 release-keys