Network problem after Oreo update on Asus Zenfone 3 max

[rahulozair44]

Description: After update Android Oreo from Asus official website my network point always 3or 4 point plz solve this
App Name:
Screenshot: https://us.v-cdn.net/6031231/uploads/ww_attachments/201907/21/080356slysyv7pavymy9za.jpg
Rooted: No
Location: India
Frequency of Occurrence: After update Android Oreo 8.1 from Asus official website Oreo my network singal point low
Firmware/App Version: Oreo 8.1
RAM: 3GB
Model: ZC520TL

[ringhardniting1]

I buy this phone