What are the biggest shocks of the last five days in tech? CBR rounds up the biggest surprises of the week.

1. The IoT is dangerous

According to security research firm Privitar, hackers could use smart hubs to find out when families are out of the house. In fact, they could even hack into the controls to change settings such as the heating or air-conditioning, putting people in danger of physical harm.

2. Microsoft has spent $15 billion on data centres

Microsoft has actually spent more money on data centres than most companies are worth: $15 billion since 1989, a spokesperson told CBR this week. The battle between the IT giant and rivals AWS, Alibaba and Google is only set to intensify in coming years.

3. Huawei third biggest smartphone vendor

The Chinese tech giant has had a good year so far, with sales of Honor smartphones topping 20 million and total smartphone sales reaching 48.2 million. The good news for Huawei is that it is now the third biggest vendor in the smartphone market, overtaking Windows for the first time.