-First you must hacked your phone with HelloOX2 FP2 (unsigned)
-To sign HelloOX2 you must using Signtool with your own cert key from your IMEI
-To get your own cert key to sign HelloOX2 using Signtool, you can get it from
here
-Than sign your HelloOX2 FP2 unsigned with Signtool (with your own cert key)
-Install HelloOX2, run it than you can upgrade Quickoffice
-You can get Quickoffice cracked by searching on this forum
-Just try it and learn, i will not gift the tool and all of rest file, just some clue...
-Sorry for my bad english, that step is from my own experiments and work...
-Iam using Nokia 5730 XM with latest firm. and i hack it with HelloOX2
-Peace hihihihihi