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Update cycle - unable to open phone

Message 1 of 1
Message 1 of 1

Update cycle - unable to open phone


Yesterday, my phone was being sluggish and whilst on my phone I think I must have clicked a software update / upgrade when trying to close an application. 

Now ever since my phone goes through a cycle of shutting itself down, I get a message "android is starting...optimising application x of 201", once it reached 201, it shuts down again. When I try to open the phone again, it goes through the same labourise cycle. 

How can I stop this from happening? So I can have my phone back again?