I have nokia x1-01 for family & friends only number and as a phone that I use when I want to be reachable but not to worry about loosing the smartphone, with 20

I have nokia x1-01 for family & friends only number and as a phone that I use when I want to be reachable but not to worry about loosing the smartphone, with 20-40 min talk time a day it lasts for more than a week on single charge, thus 4weeks standby seems credible to me