is there any model/brand thats way better than panasonic? panasonic has the softest volume but expensive, near rm400. can you guys suggest any better ones with loud ringing volume?

Normally can adjust soft, medium or high ring tone volume. Now my Panasonic cordless phone at home never use for years. Only use HP.

with or w/o sim card type?

its max n the their ringtones all soft as well

for landline, no sim

Last time was using Sharp cordless phone, old model non digital type

They were really loud, i dun think they make them anymore.
If you can find used ones, just replace the batteries with new ones and you are good to go.

can try swissvoice epure v2 or L7

I went cheapskate way. Use old TM wired phone. Since nobody ever calls landline anymore & its only use to/receive call from guardhouse. No more worries of charging also. Ringtone super loud, even your deaf grandfather can hear.

vtech (famous communication brand)