Am not able to update my nexus i9250 to android 4.3. I have never rooted or tampered with the system earlier. Any system updates, i generally get a notification and then it starts getting updated. But now, under settings>about phone>system update, it states that "waiting to download - 139 mb" and is stuck there. There is no other icon for 'checking status updates' or 'download'.
Please let me know how to proceed in downloading the system update to 4.3?