New F2 pro signal Bug


Oct 30, 2020
I am using F2 pro aka k30 pro on rom 12.5.5 version with dual sim
Sim1 has 4g enabled
sim2 doesnt support 4g so in setting i have set it automatically to 3g
whenever i turn on data on sim2, automatically signal on sim2 are vanished and it is automatically switched to preferred 4g lte and signals doesnt come back unless i again switch it to 3g

Kindly help me fiing this bug