Cheapest smartphone for LEGO – Xiaomi Redmi 7A

Since the introduction of the Boost system, the Powered Up and Control+ sets I read a lot of complaints about the smartphone requirement. People usually does not want their kids to use the parents’ expensive devices to play with LEGO. I decided to find the best option for a phone that meets the requirements of these applications but still reasonably priced and easy to get.

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Control+ connection bug when testing 42100 during building

UPDATE – The bug was fixed in version 1.0.3 of the Control+ app

When you are building the LEGO Technic 42100 Liebherr R 9800 set the app has a verification process built in after every batch of bags. This is a great addition because you can see whether the motors built in are working correctly or not.

Unfortunately there’s a bug in the current version as of 05/10/2019 (version 1.0.2 on both Android and iOS ), after the second batch of bags at page 367 you should only have one XL motor (color code red) connected to the hub in the superstructure.

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All we know about the LEGO 42100 Liebherr R 9800 set

UPDATE #4 – Here is my full review with unboxing, build details, feature presentation and an outdoor field test in a quarry!

UPDATE #3 – According to zusammengebaut.com LEGO Germany confirmed that the release of the set will be delayed until October 2019 because of some production problems of certain parts. This delay does not affect the other Technic sets scheduled for August.

UPDATE #2 – Check out my detailed summary about the Powered Up system and the currently available components that will power this set as well

UPDATE – We received a some detailed images of this gigantic construction set from the Bauma 2019 convention that happened last week (image source – Promobricks)

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