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Hackers used SS7 exploit to steal SMS confirmation code and steal bank accounts

The German mobile operator O2 confirmed that hackers used an exploit of the SS7 protocol to steal Two Factor Authentication (2FA) SMS codes sent by online banking websites to confirm fund transfers. They could successfully steal money from O2 customers bank accounts doing fund transfers at night.

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What are 5G requirements? The IMT-2020 draft

The same way True 4G had a real definition based on IMT-Advanced, the ITU released in February 2017 the draft of IMT-2020 describing the minimum requirements related to technical performance for IMT-2020 radio interface(s), which sets the goals for 5G.
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5G Frequency Bands overview

One of the objectives of 5G requires a massive use of frequency bands to allow both flexibility of use cases and large chunks of bandwidth allocated for very high throughput. Here is a summary of what frequency bands are considered so far for 5G.

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LTE Radio Coverage vs Frequency Band

I found some time ago a good PDF document from ZTE talking about APT 700 band for LTE and which was also showing a table of the theorical LTE coverage performance versus the radio frequency used. This is a very useful input to do quick coverage planning estimation based on the frequency band you can use.

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Measurement units in Telecommunications – kilo, mega, giga

I got a comment about the conversion of bps to kbps used in the LTE throughout calculator that reminded me about this bizarre situation that we usually do not convert telecom bits into kilobits the same way we convert storage bytes into kilobytes. Here is the reason why.

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GSM-R, LTE-R and Hyperloop at 1,200 kph

Hyperloop Transportation Technologies (HTT), one of the American start-up which develops a concept of super fast train moving on electromagnetic suspension at 1,200 km/h has recently signed an MoU with the region of Occitania in France to set-up its European R&D center. This made me wonder how it will be possible to communicate from an Hyperloop train with our smartphone.

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FieldTest / NetMonitoring app for Android 7

I have released a first version of the field test / network monitoring application for Android 7 (Nougat) devices. With this app, you will be able to collect xARFCN data from the network and know which frequency band your smartphone is using.

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Developping a FieldTest app with Android N (Part 3)

Playing with the app in Singapore: I bought a Singtel tourist SIM card while traveling in Singapore for a few days and tested the app to see what they were using for their 3G and 4G networks.

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Developping a FieldTest app with Android N (Part 2)

I started to develop a FieldTest application for Android that I will publish on Google Play for everyone to use. I wanted to do this because of the frustration of not being able to find an app that is both eye-candy and reports useful information from my network.

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Developping a FieldTest app with Android N (Part 1)

​Recently I discovered that Android N (7.0) provides a new method getArfcn() to get the Absolute Radio Frequency Channel Number, which gives you the exact frequency identifier that is used by the mobile phone on 2G (ARFCN), 3G (UARFCN) or 4G (EARFCN).

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