Here am sharing the main differences between new iPhone 4s and iPhone 4,so you can think about the iPhone 4s upgrade is really needed or not ?

| iPhone 4S |
iPhone 4 |
| Price on contract starts from -$99 8GB |
Price on contract starts from -$199 8GB |
| processor – Dual-core Apple A5 |
processor -Apple A4(single core) |
| Display- 3.5-inch IPS 960 x 640 |
Display- 3.5-inch IPS 960 x 640 |
| primary camera-8 megapixel AF with flash and f/2.4 aperture |
primary camera-5 megapixel AF with flash a |
| Secondary camera-VGA at 30fps |
Secondary camera-VGA |
| Video recording- 1080p at 30fps |
Video recording-720p at 30fps |
| Network-Hybrid GSM / CDMA “World Phone” |
Network-Quadband GSM, pentaband HSPA |
| connectivity -Bluetooth 4.0,wi-fi 802.11b/g/n |
connectivity -Bluetooth 2.1,wi-fi 802.11b/g/n |
Battery life-Up to 8 hours talk time on
3G
Up to 14 hours talk time on 2G
Up to 6 hours data on 3G
Up to 9 hours data on Wi-Fi
Up to 40 hours audio
Up to 10 hours video |
Battery life-
Up to 7 hours talk time on
3G
Up to 14 hours talk time on 2G
Up to 6 hours data on 3G
Up to 10 hours data on Wi-Fi
Up to 40 hours audio
Up to 10 hours video
Up to 300 hours on standby |
| Weight-140 grams |
Weight-137 grams |
| Dimensions-115.2 x 58.6 x 9.3mm |
Dimensions-115.2 x 58.6 x 9.3mm |
In my opinion new iPhone 4s is better in terms of performance and speed so people who needs better gaming and multitasking then this upgrade is really worth and if you like mobile photography ,now you can take better photos and record videos in full HD with new 8 megapixel camera .
am sure that old design is the main reason behind the people not willing to upgrade their iPhone 4.
please share your opinions in comments .