I have been experiencing this for already 3 months. “Normal” SINR level in my area is 2-4. With this level I get decent speeds and everything’s fine. However, suddenly the SINR level on the SXT (running OS 6.49) jumps to 16-18 (impossible where I am) and with this indicated level the speed plunges to a crawl. If disable/enable the connection, the SINR level returns to normal, but then in some time it starts back again being 16-18 and everything is sloooow until I disable/enable again. Could somebody please tell me if this might be caused with any settings? This issue just drives me nuts. Thanks.
Good indication for the quality/perfomance of your LTE link is the CQI. The max is 15 and should in most cases be the case. 12 still works, 9 gets tricky and at CQI 6 the link is almost unusable.
The LTE world is where the transmitters cooperate and tell your LTE to which one to connect to. (Or decide which LTE antenna will serve you). This might change over time. Keep track of “Cell ID” and eNB (and sector and PhyCell). eNB will indicate the tower used, EARFCN will give the band and freq used.
The highest SINR is not always the best connection !!! The CQI is more an indicator, and the SXT LTE should connect to the best CQI. It does not always do it that way. Turn down the offending connection (High SINR, low CQI?) by disabling the corresponding band. If there are better CQI in other bands you will get one. If there are no alternate bands you will have no connection. While figuring out the bands used by a tower, you can even eliminate troublesome towers.
My collection at one point in the Alpes … band 20 is always used if available (many towers around that spot emit in that band with the same freq), with poor performance
