Im having the same issue as well. Ive had my phone for about a year and a half (Z Ultra) andeverything was fine up to about a month ago. Now i have to reboot my phone every few minuites or i will be disconnected from the network. Sometimes after a reboot it will stay on for hours but usually its disconnected by the next time i look at it. This is super frustrating and i see no resolution posted. If no one is able to help me i can gaurantee i will be changing phones and never looking back at another sony product again.
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