As in the title. Everything else works great. And telemetry works great too when RC and smartphone are connected via WiFi. I,m using latest firmware on Spark and RC and I have latest system update of my Galaxy S8 and DJI GO 4 app too. Please help - quality of video through WiFi sucks, but the worst is that I can't get info about my battery and altitude :/

And with google, you would have found the answer in the forum already.
Get the DJI Go4 v.4.1.15

Hi, Blus. Sorry to tell you that we would recommend users use OTG now. Our engineers are working on that. Please use wifi connection instead. Thanks for your understanding.

Greetings

Using an iPhone 7, iOS 11.2, dji 4.1.18 - OTG working flawlessly for me still (upgraded aircraft firmware today to latest)

I'm using a Galaxy S7 with Android 7.0 and unfortunately when I use the connection via USB / OTG cable I get absolutely no telemetry data, not even the GPS works.
So, to have a complete experience with Spark, I'm limited to using with Wi-Fi.
It seems that for those who have Iphone OTG works perfectly.
I hope DJI will also look at their customers who own Android.

I also use an Android device Xiaomi 5 telephone - for OTG to work you have to downgrade the DJI app to 4.1.15 or earlier. Then Otg works fine

Per other threads Thankfully DJI is working on this for a future update.

dansmar Posted at 2017-12-13 22:55
Per other threads Thankfully DJI is working on this for a future update.

I suspected the working status of the OTG support. DJI sometimes said it don't support, using wifi instead but sometimes said they were work on it.....

The fact was over one month and still no update news.

it is becoming increasingly clear that DJI prioritises iOS users to the detriment of those using Android.

Yeah, it's been another two weeks and still no fix for this issue?

In addition otg functionality is now broken on iOS ver 4.1.20 - otg functionality going backwards

Otg worked since spark introduction just stopped working in the latest versions

Dji 4.1.18 Android
Dji 4.1.20 iOS

Any previous versions works great