I have tried the sound fix for low ringtone but it will not work
ie: message is: No updates available.The build number on my phone is:U8815V100R001C02B885 .Am i missing something and can anyone point me in the right direction.Any help would be appreciated thanks in advance.

It worked on mine and while not the loudest I've come across the speaker volume is much higher than before and now usable.

You could try asking for advice on the Huawei UK facebook page http://www.facebook.com/huaweideviceuk

Or you could have a look at the modaco forums for the G300 as there is another rom B888 available, but be warned it cannot be downgraded back to the previous rom.

Having said that the sound should have been fixed after update so i dont know if another rom will fix your problem.

Try removing the battery for a couple of minutes to make sure phone has a cold boot.

You have the latest ota update which I got when I turned my phone on for the first time.The volume is fine and plenty loud.