I doubt if this relates to the speed or stability of network connection. (I don't know what tracks steps but I would like to talk about what I saw and felt.)
I have a samsung galaxy note 5 and updated it's latest version of software so it's nougat 7.0.
I changed network service from this month with 450mb lte and unlimited network connection of 400kbps qos.
and I used up 450mb lte now I'm using 400kbps qos.
the ping is about 100 and download speed is 300~420kbps upload speed is over 10mbps.
When I'm using wifi(the ping is below 10 and down&upload speed are at least over 30mbps) there seems no problem with tracking step but when I'm not using wifi Pocket Plants can't count my steps.
Before I used up 450mb of lte it looks that Pocket Plants properly counts steps without wifi.
I thought this today and now I can't connect wifi with sufficiently good quality so I can't confirm this.
I wonder if this tracking step problem relates network connection and want this problem to be solved soon.