Change font and display size 140
Change theme 140
Change screen timeout 141
Security & location 142
About security 142
Protect against harmful apps 143
Set up lost phone features 143
Lock and unlock phone 144
Set screen lock 144
Unlock with trusted devices 145
Unlock with your face 146
Unlock at trusted places 147
Keep phone unlocked while it's on you 148
Unlock with voice commands 149
Use fingerprint security 149
Use location services 151
Lock SIM card 152
Accounts 153
Add or remove accounts 153
Sync accounts and apps 154
Manage information in your Google account 155
System 156
Set up emergency information 156
Record your IMEI number 156
Find legal and product information 156
Customize the keyboard 157
Use multiple languages 158
Users and guests 159
Share your phone 159
Add, modify, remove users 160
Add or delete guest 161
Fix a problem 162
Hardware issues 162
Phone is slow or unstable 162
Phone feels warm or hot 162
Phone won't turn on 163
Phone restarts or crashes 163
Screen is frozen or won't respond 164
SD card problems 164
Call and SIM issues 167
Problems making/receiving calls 167
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