1. 安卓 1.1：
Android 1.1 是继Android 1.0 之后Google 推出的第二个Android 版本。它具有以前版本(即 Android 1.0)中包含的所有功能，并且在此版本中还添加了更多功能。在呼叫者应用程序中添加了一些功能，例如隐藏和显示数字键盘。此版本还增加了保存彩信附件的功能。它也没有像 Android 1.0 那样的正式版本名称，但非正式地称为Banana Bread 。 Android 1.1 中的 API 级别为 2。它于 2009 年 2 月 9 日发布。
2. 安卓 2.0：
Android 2.0 是继 Google 推出的 Android 1.6 之后的下一个 Android 版本。它具有之前版本中包含的所有功能，即 Android 1.0、Android 1.1、Android 1.5 和 Android 1.6，并且在此版本中添加了一些突出的功能。此版本引入了 HTML、Microsoft 支持、蓝牙 2.1、动态壁纸和更新的 UI 等功能。这个版本有一个版本名称。它的版本名称是Eclair 。 Android 2.0 中的 API 级别为 5。它于 2009 年 10 月 26 日发布。
Android 1.1 和 Android 2.0 的区别：
| S.No. | ANDROID 1.1 | ANDROID 2.0 |
|---|---|---|
| 1. | It is the second version of Android. | It is the next version of Android introduced after Android 1.6 version. |
| 2. | It is successor to Android 1.0 version. | It is successor to Android 1.6 version. |
| 3. | It is predecessor to Android 1.5. | It is predecessor to Android 2.0.1. |
| 4. | It was released on 9 February 2009. | It was released on 26 October 2009. |
| 5. | The API level in Android 1.1 version is 2. | The API level in Android 2.0 version is 5. |
| 6. | It does not have official version name like its successors. | It has official version name like its previous version. |
| 7. | It has unofficial version name ‘Banana Bread’. | It has official version name ‘Eclair’. |
| 8. | It had all the features of previous version and two more features were added in this version. | It had all the features of all previous versions and some more prominent features were added in this version. |
| 9. | Ability to show and hide numeric key-board was introduced in this version. | Updated user interface was introduced in this version. |
| 10. | Feature for saving MMS attachments was added in this version. | Bluetooth 2.1 and live wallpaper features were added in this version. |