It's really easy all that's needs is foil and you are able to use the phone this common issue with the phone is simple fix
Step 1: Temporary Fix
This is the only step because it's so simple all you need is foil even the stuff found in a peanut butter cup or gum will work
Just wrap your finger in foil that's it seems that this issue is common that's it
Step 2: Needed
Foil any kind will do eg. Gum, PB cup, etc...
Blackberry with a broken trackpad I used the 9300 model on T-Mobile