My Sony Xperia XZ keeps rebooting

[ogaseroma]

My Sony Xperia XZ keeps rebooting day in day out. I have factory reset it worked for some time but it started rebooting again. Now it doesn't go past the SONY LOGO.

What do I do? There is no Sony service center in Nigeria for phones. Please advise and if possible where is the Sony service center for phones close to Lagos Nigeria? 

Thank you.

Og Aseroma 

edited[personal details removed]

[EMS_MO72]

Hi @ ogaseroma

If you have SD card inside the device, try to take it out along with the SIM card and check again.

If that didn't work, start the device again, once you see the Sony logo, press and hold on the volume down button until the device starts and check if that will work or not.