I know a lot of people have problems using their touch screen when connected to the stock chargers. Some time it is an intermittent issue but I am willing to bet that the problem is much more widespread when the phone battery level is below 25%. Plugging in the stock charger when the phone has very low level of battery will cause the digitizer to go haywire. Just try sliding to unlock your screen and you will see the problem.
Summary of my findings. I bought 4 SGS2 for myself and family members. ALL 4 stock chargers will cause touch screen problem WHEN THE PHONE BATTERY LEVEL IS LOW. It is a slight annoyance when the phone has 50% or more battery. BUT it still doesn't function like it does when it is not connected to the charger. I tested 2 HP touchpad chargers, 1 Kodak Playsport charger, 2 Iphone chargers when the phone is below 25% and has absolutely no issue! It is not the phone but it is the charger that is faulty, They might be able to update the phone software to take care of the problem but we need to get enough data to show them that there is a problem charging and using the phone when the battery level is low.
Please see taylormah's post in the other charger thread.
Summary of my findings. I bought 4 SGS2 for myself and family members. ALL 4 stock chargers will cause touch screen problem WHEN THE PHONE BATTERY LEVEL IS LOW. It is a slight annoyance when the phone has 50% or more battery. BUT it still doesn't function like it does when it is not connected to the charger. I tested 2 HP touchpad chargers, 1 Kodak Playsport charger, 2 Iphone chargers when the phone is below 25% and has absolutely no issue! It is not the phone but it is the charger that is faulty, They might be able to update the phone software to take care of the problem but we need to get enough data to show them that there is a problem charging and using the phone when the battery level is low.
Please see taylormah's post in the other charger thread.