I just update my CS550 to V02.04.06.00 with includes Go 4 4.1.18 and I have many problems with the Spark:

• Only works at 2.4 Ghz. I can not change to 5.8 Ghz
• RTH is grey and do not work on the Go 4 neither in the RC.
• I can´t see the distance, altitude and speed of the spark in the Go 4.
• The video signal fail more than ever.
  

I swich to an old phone with Go 4 4.1.15 and all the problems disappear.

How can I go back to Go 4 4.1.15 in the CS550?
Thank you,

You seem to use an OTG cable. This unfortunately does not work with GO 4 version 4.1.18 and hopefully will be fixed soon. And even more unfortunately there is no way (that I am aware of) to go back to version 4.1.14 which was on CS before the update and has worked well. It is a highly deplorable situation indeed.

+1  with 4.1.18 use Spark with wi-fi it works as designed

Wachtberger Posted at 2017-12-18 00:32
You seem to use an OTG cable. This unfortunately does not work with GO 4 version 4.1.18 and hopefully will be fixed soon. And even more unfortunately there is no way (that I am aware of) to go back to version 4.1.14 which was on CS before the update and has worked well. It is a highly deplorable situation indeed.

Thank you!
I hope that the offline maps that i have downloaded are still there, because I saw that they have removed that option from 4.1.18.

The ONLY way to revert back to a previous version with the CS is to send it back to DJI it cannot be done by the user at the moment.

I’ve just found this, dji telling people to connect a crystal sky to the spark remote via otg so it must be supported