9sBlog

Sofia Martinez

Sofia started out as a technology journalist reviewing phones and mobile apps, then spent two years writing user guides and troubleshooting material for a telecom's Android customers. She covers Android at 9sBlog — Samsung, Pixel and Xiaomi, Google apps, storage, battery, and the settings people can never find.

55 articles

Hands typing on a laptop
Software

How to Create a Label in Gmail

Create a label in Gmail on desktop, Android, or iPhone in a few taps, nest sub-labels, color-code them, and auto-apply labels with a filter.

3 min read
A grey braided USB-C charging cable coiled on a light surface
Android

Android Phone Not Charging

Why an Android phone refuses to charge, and the fixes Google and Samsung actually document: lint in the port, moisture warnings, thermal limits, battery caps.

10 min read
A stack of paper files and folders piled on a desk
Android

How to Merge PDF Files on Android

Android has no built-in PDF merge. Compare the free browser tools, an offline Android app, Acrobat's paid Combine Files, and a no-upload Termux route.

9 min read
SIM cards in several sizes laid out on a surface
Android

Mobile Data Not Working on Android

Android mobile data dead? Rule out Wi-Fi first, then check the on-device data limit, Data Saver, SIM choice, APN and VPN before resetting network settings.

10 min read
A finger pressing the reader on a wall-mounted fingerprint access panel
Android

Fingerprint Sensor Not Working on Android

Fingerprint failing on your Galaxy or Pixel? Work through screen protectors, finger and sensor condition, Android's deliberate PIN prompts, and the hardware check.

11 min read
A woman sitting on a bench outdoors holds a black smartphone with a blue screen
Android

Phone Battery Charging Myths, Debunked

Overnight charging, draining to zero, fast charging: most phone battery rules are myths. Here's how lithium-ion batteries really age and what actually helps.

7 min read