Bug: Data counter is highly unreliable
There seems to be a serious problem with the device's data counter reliability. Simply put: the device seems to be synchronizing the numbers for data traffic between home network and roaming, in addition to spontaneously resetting them (my current suspicion is of an integer overflow or something similar - like there was in the Media Player prior to 1.0.2.5).
Here's what my Jolla had to say about mobile data usage in January (notice how close to each other the numbers between home network and roaming were):
Home network:
Sent: 445.7 MB
Received: 1.0 GB
Roaming:
Sent: 440.5 MB
Received: 914.8 MB
Considering that my 10GB/month data plan was exceeded in January, there is no way those figures could possibly be accurate.
I reset the counters on Feb 4th and then did some experimenting with NetCounter, comparing the values it gave me with the values the device was giving me and, during that experimentation, the results seemed credible and were well in line with each other. However, given just a few days of active network use, the device's own data counter went way off. Here's what the data counter said 5 days later (for the record: I never left the home network during that period):
Home network:
Sent: 12.4 MB
Received: 250.4 MB
Roaming:
Sent: 12.4 MB
Received: 250.4 MB
The values were Identical!
For that same 5-day period NetCounter, which was also reset on Feb 4th, said that I'd used a total of 1.8 GB of mobile data - a much more credible-looking figure, even if that too seems too low, considering that I watched 4 or 5 movies and 5 or 6 episodes of a TV-series from Netflix during that time (yeah, I got a flu so there wasn't much else to do while lying in bed).
Roughly a week later, on Feb 13th, the numbers were as follows (for the record: I didn't touch the counters after Feb 4th):
Home network
Sent: 126.7 MB
Received: 62.8 MB
Roaming:
Sent 126.9 MB
Received: 64.3 MB
Notice how the device claimed that there'd been considerably less incoming traffic. Also notice how close to each other the sent/received numbers between home network and roaming were. Again.
Definitely worth looking into and fixing, IMO.
Update 2019: more than five years after this issue was posted, on Sailfish OS 3.1.0.11, the data counters still cannot be trusted at all.
yes, i found my data counter low after using netflix and my provider warned me about the usage
teun ( 2014-02-05 09:56:51 +0200 )editIt's unreliable for me also and slightly worrying that it shows roaming data usage when it hasn't. I've had at least two monthly bills now with no roaming in the bill but the data counter showing many megabytes.
aegis ( 2014-02-13 23:58:13 +0200 )editI am not sure about Mobile data counter because used Mobile data very less. Mostly I am in WLAN and I have also noticed that it is not showing proper data counter. Like It was showing Received 1GB received data 2 days ago and now 512MB received data. I didn't clear the counters. There is definitely something wrong there
Saqib Iqbal ( 2014-02-23 17:07:18 +0200 )editUpdate 5 will include fixes that improve the accuracy of the data counters.
Aaron McCarthy ( 2014-04-07 04:44:49 +0200 )editstill same behaviour as described above by "typo" even with 1.0.5.19 - don't see any improvements
argonius ( 2014-05-16 13:35:54 +0200 )edit