When downloading, updating or syncing apps to an i Device like i Phone 6,i Phone 7 Plus and i Pad Air, apps may occasionally get stuck waiting and never finish installing on the i Phone 6.
Even with the latest update on ios 10.3.1, this error would appear sometimes.
And the other end if you don’t have Data plan or Wi-Fi network and other critical situation you have single way to buy or Update i Phone apps through i Tunes running on Mac or PC.
This is the best way for Update i Phone apps through i Tunes in Mac (Mavericks, Yosemite and later) and PC(Windows).
Have you any suggestion and any other alternative way for update apps, Games and more than share with us.
If you do the complete reset and then restore from a backup, you might be putting the problem right back on your i Phone.
I would recommend doing a backup first and only doing the restore from backup if this doesn't fix the problem.
To Restart or Reboot your i Pad air, i Phone or i Pad touch; Looking Button.