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 1.5：
Android 1.5 是继 Google 推出的 Android 1.1 之后的第三个版本和下一个版本。它具有以前版本(即 Android 1.0 和 Android 1.1)中包含的所有功能，并且在此版本中还添加了一些额外功能。此版本中添加了蓝牙连接等功能，还添加了视频观看和录制功能。这是第一个有版本名称的版本。它被称为纸杯蛋糕。 Android 1.5 中的 API 级别为 3。它于 2009 年 4 月 30 日发布。
Android 1.1 和 Android 1.5 的区别：
| S.No. | ANDROID 1.1 | ANDROID 1.5 |
|---|---|---|
| 1. | It is the second version of Android. | It is the third version of Android. |
| 2. | It is successor to Android 1.0 version. | It is successor to Android 1.1 version. |
| 3. | It is predecessor to Android 1.5. | It is predecessor to Android 1.6. |
| 4. | It was released on 9 February 2009. | It was released on 30 April 2009. |
| 5. | The API level in Android 1.1 version is 2. | The API level in Android 1.5 version is 3. |
| 6. | It does not have official version name like its successors. | It has official version name. It was the first version to have official version name. |
| 7. | It has unofficial version name ‘Banana Bread’. | It has official version name ‘Cupcake’. |
| 8. | It had all the features of previous version and two more features were added in this version. | It has all the features of Android 1.0 and Android 1.1 and several more features were added in this version. |
| 9. | Ability to show and hide numeric key-board was introduced in this version. | Soft key-board with text prediction was introduced in this version. |
| 10. | Feature for saving MMS attachments was added in this version. | Feature for watching and recording video was included in this version. |
| 11. | It did not have bluetooth connectivity. | Bluetooth connectivity was introduced in this version. |