I turned detective to lift the lid on mystery mobile phone charges

I found murky world where users can be charged for services, sometimes unaware that they signed up

Melinda Gates pushes G7 to close digital gender gap in Africa

World leaders to back call to help rural poor and women access mobile banking

James Dyson buys £43m penthouse in Singapore

Purchase comes months after British inventor revealed plans to move firm to city-state

BA faces £183m fine over passenger data breach

ICO says personal data of 500,000 customers was stolen from website and mobile app

Food waste: how to get cheap grub and help save the planet

Apps to sell off the large number of uneaten restaurants and cafe meals are finding a lot of new fans

The best travel tech for a stress-free holiday

How to keep your mobile, tablet, Kindle and headphones charged and connected abroad

Cash request from a Facebook ‘friend’ left me £300 out of pocket

I was defrauded by a hacker posing as someone I knew who said he needed help

Bitcoin price falls below $10,000 as boost from Facebook’s Libra fades

Cryptocurrency climbed to nearly $14,000 on news social network was launching rival

The Guardian view on Facebook’s Libra: funny money

Editorial: This audacious attempt to launch a privately controlled currency may come to nothing. We should hope it does

Mobile phone users can now switch network with just one text

New process makes it easier to get PAC code without provider trying to persuade users to stay

Mobile banking to overtake high street branch visits in two years

Rapid uptake means banking via an app rather than visiting your bank in person will become the mainstream by 2021

How can I extend the range of my home wifi?

Our broadband router is in the living room, which is about 10 metres from the kitchen

Apple recalls 15in MacBook Pro laptops over battery fire risk

Customers urged to stop using limited number of machines sold between 2015 and 2017

NatWest is first big UK bank to let customers open account with a selfie

Lender uses AI to confirm the image matches the applicant’s ID documents

Amazon’s attack on Alexandria Ocasio-Cortez is corporate gaslighting

The tech giant’s PR chief has accused the congresswoman of ‘making stuff up’, but its audacity in positioning itself as a benevolent activist is jawdropping, says Arwa Mahdawi