It has turned out that the following procedure often helps if something has gone wrong while preparing the device for Sailfish OS and/or while installing Sailfish OS.
These instructions were originally written for Xperia X. However, the same ones work for Xperia XA2 and Xperia 10 models, too.
Depending on the problems observed on your Xperia, it may be enough to reinstall ("reflash") Sailfish OS to it -- see this help article. However, if your Xperia cannot use the services of cellular network properly (or at all), then it may be necessary to revert the device back to Android first, and then reinstall Sailfish X.
NOTE: Reverting the device back to Android means that all data in the device memory will be deleted. Only the SD and SIM cards remain untouched.
1. This is our plan
- revert the device back to Android OS first
- use your device and your SIM card with Android OS, mobile data in particular
- re-flash Sailfish OS to the device.
2. Reverting Xperia back to Android
2.1. Connect and get Emma
Reverting Xperia device back to Android requires the Emma tool from Sony. Emma requires a Windows PC to run.
Follow chapter 1, option 2 in our official Sailfish X instructions (the Windows version for Xperia X). So, even if you had an Xperia XA2 or Xperia 10, you should follow the instructions of Xperia X for using Emma (but only this part, using Emma).
Install Emma. Once done, you will use it to download and install Android OS to your device. The download size is about 2.5-3 GB, so reserve time and wait patiently.
Now, open Emma. Turn your Xperia off. Keep the Volume DOWN button pressed when connecting the USB cable between the phone and PC, and you must see GREEN light on the device.
2.2 Downloading and installing the latest baseband version
See picture 1a1 below. It shows the Emma view on PC once you have connected Xperia X and requested the list of available Android services (i.e., after you have clicked on "All services" button or "View all" button). Pictures 1a2 and 1a3 have the corresponding views for Xperia XA2 and Xperia 10 Plus, respectively.
Select the latest baseband version (or "service" as they are called in Emma). As of January 2020, the latest services were:
- Xperia X: 34.4.A.2.118
- Xperia XA2: 50.2.A.0.400
- Xperia 10: 53.0.A.8.69
If there are two code packages with the same version ID, choose the one with type "Software Update Content Erase", please. This is to force all possible changes in place.
Picture 1a1. Initial Emma view from Xperia X
Picture 1a2: Initial Emma view from Xperia XA2
Picture 1a3: Initial Emma view from Xperia 10 Plus
Then click "Apply service". Emma starts to download the update which lasts quite a while as the size is about 2.6 GB (see picture 1b). Once downloaded, click the button at the bottom right corner to install the code to your Xperia.
Picture 1c above shows how the downloaded software is being flashed to an Xperia X. Picture 1d below indicates that the job was completed successfully. Picture 1e shows the success for Xperia XA2 after updating the device to Android 9 (build version 50.2.A.0.400).
3. Checking that the phone works with Android
Detach the USB cable from the device now. Start the device with the Power button and run the Android start-up routine where you can skip as many steps as possible (as you will soon install Sailfish OS).
Please note that it takes quite a while (minutes) before the Android start-up routine appears.
THIS IS VERY IMPORTANT:
Use your Xperia device some time with Android OS. Check that phone calls can be made and received, that you can browse the internet with a mobile data connection (turn WLAN off). Then turn WLAN on and make sure you can access the internet using WLAN. Next check that the camera works. You might also want to check the touch display, loudspeaker and microphone.
See pictures 2a, 2b and 2c below. Do not forget to
- Turn "Developer options" on by a quick sequence of taps on "Build number" in Settings > System > About phone.
- Enable "USB Debugging" in "Settings > System > Developer options", again.
- The bootloader should appear unlocked as in picture 2c. It is normal that it is greyed out (as one cannot re-lock the bootloader).
Pictures 2a, 2b and 2c.
4. Installing Sailfish X again to Xperia X, XA2 or 10
Installing Sailfish can be made with Windows, Linux or Mac computers. In the next chapters, we have pointers to our official Sailfish X instructions.
Make sure you have the latest available Sailfish OS version downloaded to your computer. If not you can download it from this repository. Please sign in to this service by using the same Jolla account that you used for buying the Sailfish X license.
Check that the contents of your Sailfish OS directory are similar to that in pictures 3a or 3b below. Note that there are two different install files for the single SIM and dual SIM Xperia X devices, and six different install files for various Xperia XA2 devices and four files for Xperia 10 devices - please ensure that you select and download the correct one for your device.
Picture 3a: Sony Xperia X single SIM (f5121)
Picture 3b: Sony Xperia XA2 dual SIM (H4113)
In particular, check that you have file "SW_binaries_for_Xperia_Android*.img" there. If missing, select the instructions applicable to you :
- for Xperia X: SW_binaries_for_Xperia_AOSP_M_MR1_3.10_v13_loire.img
(if missing, visit chapter 5: Windows, Linux, Mac )
- for Xperia XA2: SW_binaries_for_Xperia_Android_184.108.40.206_r1_v16_nile.img
(if missing, visit chapter 5: Windows2, Linux2, Mac2 )
- for Xperia 10: SW_binaries_for_Xperia_Android_9.0_2.3.2_v9_ganges.img
(if missing, visit chapter 5: Windows2, Linux2, Mac2 )
Install (flash) Sailfish OS to your Xperia. Select the instructions applicable to you :
- Xperia X, as instructed in chapters 6: Windows, Linux, Mac.
- Xperia XA2, as instructed in chapters 6: Windows2, Linux2, Mac2.
- Xperia 10, as instructed in chapters 8: Windows2, Linux2, Mac2
NOTE: It is Volume UP button this time and you must see the BLUE light (if green, disconnect, reconnect and try again - press the button gently).
After you have completed flashing, the printout similar to that shown in the attached PDF file should appear on your computer screen (Sailfish OS version ID will be different as time goes on).