Samsung Galaxy S5 User Manual page 15

Settings > More settings > Mobile networks > Connections optimizer and uncheck the box.
See Connections Optimizer for details.
1. From the Welcome screen, select a language (if prompted) and tap Start to get started.
To skip any section where permitted, tap Next.
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Note: On the Welcome screen, there may also be an Accessibility button. If you are visually
impaired or hard of hearing, tap Accessibility to change the accessibility settings.
2. Follow the onscreen instructions to complete each section. For each topic, you will have the
option to skip it and continue to the next screen.
Wi-Fi – If prompted, follow the prompts to sign in to an available Wi-Fi network. For secured
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Wi-Fi networks, you will need to enter a password. See Wi-Fi for more details.
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