Tello can not fly well after RYZE repair, how worse?

I informed RYZE Japan how replaced Tello can not fly well as before repair.

I will ship it to RYZE repair center to exchange into a right Tello.

I will show you here how present Tello that RYZE Japan sent me, can not fly as same as previous Tello.

• Below 10m high over your head(means no distsnt), Tello sends me warning "Weak WIFI, please let Tello near you!". Although previous Tello does not send warning at 30m high and 50m distsnce.
• Present Tello is unable to control within no far remote from me. If you try to discend it, Tello keeps hovering ignoring command to descend.
• Control smartphone gets black out. You can not receive images Tello should send to your iphone.
• Uncontrolable drone is very dangerous. Finaly smartphone wifi automatically shut down connect with present Tello.
• Previous Tello can fly well 100m dist x 30m high.
• Present Tello can not fly within 10m dist x 8m high.

Please compare Present Tello and Previous Tello, watching movies they respectively shot.

The former follwoing 2 movies are taken by Present Tello with sending weak wifi warnings.

Sometimes it is unable to control or it gets black out.
Sometimes movies does not continue or does green out.

It is clear from these movies, I can not fly present Tello ss far as the distant previous can fly.

Previous Tello took movies the followings without sending warning and always controlable.

I had 2 Tellos. Both Tello can fly as well as shown in the movie, at the distance and at the hight as shown in this movie.

Sorry Present Tello should not be able shoot like this one. It can not fly far nor high as this.

This can be done by Tello , I think.

Finaly, I add here WIFi analysis results measured WIFI analysis, android application.

This is shown regarding Present Tello at 1m distance.

 I wonder if it is weaker than WIFI router farer disrant, 3m.

RYZE Tech will send me another Tello .

I hope that does not have WIFI weakness , whici is lack of fully function of drone Tello.

And it is my conclusion, 

Even repair by product organization does not bring previous perfomances of Tello. Because repair by RYZE Tech Japan is not true repair but exchange another Tello.

So you shall  take any risks which new Tello has substantially.

In case of my affair, it may be  better to replace 4 motors damaged by myself.

DroneNovice3

Tello.