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10.12 Why is there no signal suddenly?
1. Make sure your SIM card is standard (cut cards are not supported), because non-standard
cards may cause this problem.
2. Make sure you are in an open area instead of a closed area or a remote area with poor
signal strength.
10.13 How do I share a network and enable a Wi-Fi
hotspot?
When you enable the Wi-Fi hotspot on your phone, other phones can access the Internet using
your data plan.
Go to Settings > More > Tethering & portable hotspot > Portable Wi-Fi hotspot to set the
hotspot.