Other mfg can do this so not sure why you can't but allowing secondary sim to use primary sim data for virtual voice over wifi. This let's both sims have full functionality even if one has no service by using wifi calling but with lte/5g instead.
Yet two other mfg do it (Google and apple). It doesn't use that much battery. The data packets are minimal and you're phone already has an active data session. Dual sim standby uses more battery than using it over data even because the phone had to dance between providers and frequency.
Thank you very much for your suggestion. Your suggestion has been communicated to the developer and the development project manager is reviewing the content. After reviewing your suggestions, we will apply them to the official version if your proposal matches our concept. We appreciate your contribution to the beta program.
