The Mobile World Congress 2015 is winding down, and there were a number of announcements and developments worth taking in. Among the various announcements of smartphones, wearables, and other technology, these were the ones that stood out.

• Samsung formally announced its Galaxy S6 and Galaxy S6 Edge smartphones, and they are expected to be on the market in April 2015. While the phones are unquestionably the most eye-catching phones Samsung has ever released, rumors about the expected cost of the phone – from about US$780 for the 32GB version to over US$1,000 for the 128GB version of the Galaxy S6 – make it clear that the company believes the phone is worth a premium over a comparable iPhone 6.

• HTC announced its new flagship smartphone, the HTC One M9. While the internals have received significant upgrades, the look and feel of the device itself is very similar to that of its predecessor, the M8. The phone is expected to be released in Taiwan in March 2015. The company also announced its first wearable, a GPS fitness tracker called the Grip.

• Huawei released its first smart watch, the Huawei Watch. The circular smart watch was praised by many attendees for being far more stylish than many of its Android Wear competitors. The watch is expected to be released worldwide in mid-2015, and features a sapphire crystal 1.4-inch AMOLED display. The watch will also come in a luxury edition, called the Watch Urbane, which will have 4G LTE capabilities and will be capable of VoLTE, according to the company.

• In other LTE-capable news, Panasonic announced its Nubo, a US$250 wireless security and surveillance camera expected to be the company’s answer to the Dropcam. The device incorporates WiFi, 2G, 3G, and 4G wireless data capabilities, which means it will work in any place with a cell signal. The company will offer service plans in Europe running from US$7 to US$10 per month, and will include cellular connectivity and cloud storage for video.

• Qualcomm announced a fingerprint sensor that the company claims is even better than the Touch ID sensor found on Apple products. Snapdragon Sense ID uses a 3D scanning technology that can scan through any material used in current smartphones, including metal, glass, sapphire and plastics. This means that the sensor can be embedded in any point of the smartphone.

• Finally, GSMA announced the findings of a report that there would be one billion new unique mobile subscribers by 2020. The report, titled “The Mobile Economy: 2015”, forecasts that the number of unique mobile subscribers would increase from 3.6 billion in 2014 to 4.6 billion in 2020, driven by new subscribers in the developing world. Overall, mobile connections are expected to increase from 7.1 billion in 2014 to 9 billion by 2020.