Samsung i750 User Guide - Page 213

Problem Solution Images on the screen cannot be seen. This may happen when you use the phone in direct sunlight. Use the phone in the shade or in normal indoor lighting conditions. Lines appear on the display. This may happen if the battery is not fully charged when you use the phone for the first time, when you turn on the phone's power after not using it for a long time, or if you remove the battery carelessly. This will not affect the life span or operation of your phone. Remove the battery from the phone and insert it back into the phone. Turn it on again. Reset your phone. Appendix Problem Solution The display is not clear. In direct sunlight, you may not see the display clearly. Moving to a place with different lighting should solve this problem. I frequently cannot make or receive calls, or calls are cut off without apparent reason. This may happen when your connection to a network is unstable. Move to another place try again. 211