Let's compare each phone and tablet in the specs table.
| iPhone 3GS | iPhone 4 | |
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| Manufacturer | Apple | Apple |
| Release Date | ||
| Screen Size | 3.5 inch | 3.5 inch |
| Resolution | 320 x 480 | 640 x 960 |
| Display Details | ||
| Max Refresh Rate | ||
| Max Brightness | ||
| Glass | ||
| Body Size | 62.1mm x 115.5mm x 12.3mm | 58.6mm x 115.2mm x 9.3mm |
| Weight | 135 g | 137 g |
| Processor | Samsung S5PC100 | Apple A4 |
| OS | iOS 3 | iOS 4 |
| Main camera 1 | 3-megapixel | 5-megapixel(f/2.8) |
| Main camera 1 details | ||
| Main camera 2 | ||
| Main camera 2 details | ||
| Main camera 3 | ||
| Main camera 3 details | ||
| Main camera 4 | ||
| Main camera 4 details | ||
| Main camera 5 | ||
| Main camera 5 details | ||
| Sub camera 1 | 0-megapixel | |
| Sub camera 1 details | ||
| Sub camera 2 | ||
| Sub camera 2 details | ||
| Battery | 1,219 mAh | 1,420 mAh |
| Charge | ||
| Video playback time | ||
| RAM(GB) | 0.256G | 0.5G |
| RAM details | ||
| ROM(GB) | 8G | 8G |
| ROM details | ||
| Antutu | ||
| Water resistance | - | - |
| Dust resistance | - | - |
| SIM | ||
| NFC |