1. Android 1.1：
Android 1.1是Google继Android 1.0之后推出的第二个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一些其他功能。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。此版本中还添加了用于保存MMS附件的功能。它也没有像Android 1.0这样的正式版本名称，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. Android 2.0.1：
Android 2.0.1是Google引入的Android 2.0的更新版本。它具有Android 2.0的所有功能，并进行了一些修改。此版本未引入任何新功能。这个版本与先前的Android 2.0版本非常相似，并且两者都有很多相似之处。该版本具有版本名称。其版本名称为Eclair 。 Android 2.0.1中的API级别为6。它于2009年12月3日发布。
Android 1.1和Android 2.0.1之间的区别：
| S.No. | ANDROID 1.1 | ANDROID 2.0.1 |
|---|---|---|
| 1. | It is the second version of Android. | It is the next version of Android introduced after Android 2.0 version. |
| 2. | It is successor to Android 1.0 version. | It is successor to Android 2.0 version. |
| 3. | It is predecessor to Android 1.5. | It is predecessor to Android 2.1. |
| 4. | It was released on 9 February 2009. | It was released on 03 December 2009. |
| 5. | The API level in Android 1.1 version is 2. | The API level in Android 2.0.1 version is 6. |
| 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 Android 2.0 and no new features were added in this version. |
| 9. | Ability to show and hide numeric key-board was introduced in this version. | It had updated user interface. |
| 10. | Feature for saving MMS attachments was added in this version. | It had Bluetooth 2.1 and live wallpaper features. |
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