HTC phone locked after too many pattern unlock attempts and googlemail not worked- pls help me!

I gave my mum my HTC phone a couple of years ago. She thought the phone was inadvertently calling people so I put a pattern lock on it. She promptly forgot this and made ten attempts to unlock the phone! I have to enter my gmail and password but that is not working.
I also have as a last resort tried to do a factory reset but even that is not working.
Any ideas pls?
My mum went to a few phone shops but they couldn't help.

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by jameson.vandervort
4 hours ago
Last post by blueilwitz
2 hours ago
Last post by wbogisich
2 hours ago
Last post by eula66
2 hours ago
Rooting evo 4g
Started by bconn
Last post by stefan69
3 hours ago
Last post by aylin.grimes
3 hours ago
Last post by donald86
26 minutes ago
help
Started by lawson34
Last post by aliyah26
1 hour ago
Last post by medhurst.jettie
3 hours ago
Last post by bbashirian
2 hours ago
Last post by kreiger.dino
1 hour ago
Last post by ashlee.lowe
2 hours ago
Last post by vprosacco
2 hours ago
Last post by santos68
16 minutes ago
Last post by skiles.mckayla
2 hours ago
Last post by isai.nitzsche
3 hours ago