Samsung Galaxy S4 User Manual page 454

Update. After the Update, you may no longer use the Software that
formed the basis for your Update eligibility. The updated Software
version may add new functions and, in some limited cases, may
delete existing functions.
While the Update will be generally available, in some limited
circumstances, the Software updates will only be offered by your
network carrier, and such Software updates will be governed by your
contractual relationship with your network carrier.
With the "Automatic Update" function enabled (as in the default
setting in the System Update menu in the Setting), your device
downloads some Updates automatically from time to time. Your
device will, however, ask for your consent before installing any
Update If you choose to disable the "Automatic Update" function,
then you can check the availability of new Updates by clicking on the
"Check Update" menu in the Setting. We recommend that you check
availability of any new Updates periodically for optimal use of your
device. If you want to avoid any use of network data for the Update
downloads, then you should choose the "Wi-Fi Only" option in the
Setting. (Regardless of the option you choose, the "Automatic
Update" function downloads Updates only through Wi-Fi connection.)
6. Some features of the Software may require your device to have
access to the internet and may be subject to restrictions imposed by
your network or internet provider. Unless your device is connected to
the internet through Wi-Fi connection, the Software will access
through your mobile network, which may result in additional charges
depending on your payment plan. In addition, your enjoyment of
some features of the Software may be affected by the suitability and
performance of your device hardware or data access.
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