Tab 3 is tricky when replacing iphone 3GS battery!
20 - 30 Minuten
Wifes battery was dying before the day was over
Went well except for tab 3! If your not careful, you could break the plastic! Also, the battery was hard to take out so be careful!
I pulled the ribbon out of tab 3 without needing to lift the plastic "90 degrees". Apparently, mine doesnt lift like the instructions claim it does. Dont break it if it doesnt lift! Inserting the ribbon back into slot 3 is the hardest part