Can't beat the price. Had these for maybe 2 years now.
Screwdriver:
http://www.homedepot.com/p/Husky-8-IN-1 ... /100074336
Torx driver:
http://www.homedepot.com/p/Husky-8-IN-1 ... /100087664
$6 each. The torx set includes T4, T5, T6, T7, T8, T9, T10 and T15. Not sure if cell phones use anything smaller than T4. Maybe they do. The bits store in the handle.