my htc one is cyling on and off. Can I stop this?

my HTC one is cycling on and off. I cannot stop it from doing this. T-Mobile said it is either a software issue or the on/off switch is locked down. I did not back up my contacts and have 400 on my phone , with no hard copy. They have said I will not be able to retrieve my contacts. Any ideas?

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Image tip
Started by alueilwitz
Last post by wilkinson.nathanael
4 hours ago
Last post by lina30
3 hours ago
Last post by lucy.kozey
2 hours ago
Last post by eva04
3 hours ago
Last post by ooberbrunner
4 hours ago