Samsung S20 FE
I had to use 1 sim at a time and reboot the phone in between changing sims as the app was being all wonko with both sims in and disabling one.
Sounds as if Samsung's support for multi-SIM is not quite the same as generic Android.
The Virgin Sim is using 1800Mhz as was posted & so is the EE Sim. With both sim's in and working at the same time and when the app is not flipping out on me it also shows that both sims are using 1800Mhz
Agreed, both SIMs are using Band 3 (1800 MHz) and the same transmission on the mast, EARFCN 1761 which is . They are using the same MAST with the same eNB (enhanced Node B) reference 15469.
1761 tells me this is the EE physical network with a 10 MHz transmission. Unfortunately those screen shots don't tell me if the phone is using two transmissions together (known as CA or carrier aggregation). Your phone is very new, so it WILL do the aggregation when needed, but normally drops to save power when not transferring data.
Checking up the eNB number on the cellmapper website shows me you are receiving signals from the mast on top of the BT exchange (ATE) in the city centre, right next to the Park Inn hotel. The website shows that the mast is transmitting two lots of Band 3 with 1617 at 20 MHz and 1761 at 10 MHz and is also transmitting Band 7 (2600 MHz) on 3350 at 20 MHz and 3179 at 15 MHz.
So EE has allocated 20+10 + 20 + 15 = 65 MHz of LTE capacity to that mast. As a city centre mast it is probably carrying a lot of customers and a LOT of load.
So the fact you are getting faster from Virgin Media than EE has to be down to the price plan
that you have paid for.
When Virgin Media moves to Vodafone, there is also a Vodafone mast on the same roof, and Cellmapper shows there is Band 1 (2100mhz) at 10 MHz, and Band 20 (800 MHz) at 10 MHz, for a total capacity of 20 MHz.
So 45 MHz less than EE, so speeds will drop like a stone, unless Vodafone dramatically invest in capacity.
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