What is the difference between different versions of android?

I'm thinking of buying a smartphone with Android OS, v2.1 (Eclair) and I'm wondering whether that's a bad idea. I wanna buy this one because it's cheaper than gingerbread or icecream sandwich. What's the reason for such difference? Should I buy this phone?What is the difference between different versions of android?
Different Android versions have different features and specs. The latest the Android O.S, you get latest features and better performance and stability.

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no 2.1 is very old version of android OS, u can go for 2.3 that is most common in 2days fone u can buy galaxy y which comes with 2.3 android n its cheaper.



no. of apps increases by upgrading android versions.



(2.3 Gingerbread refined the user interface, improved the soft keyboard and copy/paste features, improved gaming performance, added SIP support (VoIP calls), and added support for Near Field Communication.) from wikipedia.orgWhat is the difference between different versions of android?
Advanced version is always better. And you should be at least on 2.2 to be trouble free from internal memory shortage issues. 2.2 onwards you can move apps to SD card which help survive with limited internal memory.

The difference you can find on below link.
Usually, you'll see improvements in the following areas.



1) Graphics

2) More secure

3) Faster loading

4) More intuitive design



Downside is that sometimes, the improvements use more CPU and therefore, more power. But these are usually negligible.What is the difference between different versions of android?
speed is one of the matter respect to difference among andriod os, v2.1 or gingerbread or icecream sandwiich.

by the way, nice selection and i also using this version of andriod. can buy..
the two things can be mentioned here. First is the speed difference follows with the second major difference of older and latest versions.
no ,its really a old version .you should go for android 2.3.1 or 2.3.3.the differences are belows-
Table_01: Android 2.1 Additional Features
1. Screen support for low density small screens QVGA (240脳320) to high density, normal screens WVGA800 (480脳800) and WVGA854 (480脳854).
2.Instant access to a contact鈥檚 information and communication modes. You can tap a contact photo and select to call, SMS, or email the person.
3. Universal Account 鈥?Combined inbox to browse email from multiple accounts in one page and all contact can be synchronized, including Exchange accounts.
4. Search feature for all saved SMS and MMS messages. Auto delete the oldest messages in a conversation when a defined limit is reached.
5. Improvement on camera 鈥?Built-in flash support, digital zoom, scene mode, white balance, color effect, macro focus.
6. Improved virtual keyboard layout for accurate character hits and improve typing speed. Virtual keys for HOME, MENU, BACK, and SEARCH, rather than physical keys.
7. Dynamic dictionary that learns from word usage and automatically includes contact names as suggestions.
8. Enhanced browser 鈥?the new UI with actionable browser URL bar enables users to directly tap the address bar for instant searches and navigation, bookmarks with web page thumbnails, support for double-tap zoom and support for HTML5:
9. Improved calendar 鈥?agenda view provides infinite scrolling, from the contact look up list you can invite for event and view attending status.
10. Revamped graphics architecture for improved performance that enables better hardware acceleration.
11. Support Bluetooth 2.1
12. Improved Google Maps 3.1.2
13. Live Wallpapers


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Features included in version 2.2
1. Tips Widget 鈥?the new tips widget at the home screen provide support to users to configure home screen and add new widgets.
2. Exchange Calendars are now supported in the Calendar application.
3. Easy set up and sync an Exchange account, you just have to enter your user-name and password.
4. In composing an email, users can now auto-complete recipient names from the directory with the global address list look up feature.
5. Multiple language recognition simultaneously.
6. Onscreen buttons give easy access to UI to control camera features such as zoom, focus, flash, etc.
7. USB tethering and Wi-Fi hotspot (your phone works as a wireless broadband router.
8. Enhance browser performance using Chrome V8 engine, which enhance faster loading of pages, more than 3, 4 times compared to Android 2.1
9. Better memory management, you can experience smooth multi tasking even on memory constrained devices.
10. New media framework supports local file playback and HTTP progressive streaming.
11. Support applications over Bluetooth such as voice dialling, share contacts with other phones, Bluetooth enabled car kits and headsets.
New features included in version 2.3
1. New user interface has a simple and attractive theme in black background, which is designed to give a vivid look while being power efficient too. Menu and settings are changed for ease of navigation.
2. Redesigned soft keyboard is optimized for quicker and accurate text input and editing. And the word being edited and dictionary suggestion is vivid and easy to read.
3. Multi touch key cording to input number and symbols without changing input mode
4. Selection of word and copy/paste made easy.
5. Improved power management through application control.
6. Provide user awareness on power consumption. Users can view how the battery is used and which consume more.
7. Internet calling 鈥?supports SIP calls to other users with SIP account
8. Support Near-field communication (NFC) 鈥?high frequency high speech data transfer within a short range (10 cm). This will be useful feature in m commerce.
9. A new download manager facility that supports easy storage and retrieval of downloads
10. Support for multiple cameras


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