I have a UK I9505 o2 supplied and compared to my old o2 supplied i9100, the signal has been poor from the onset. If I install Pure Google pre rooted android 4.3 V2.1 the signal my phone receives is much better. I currently have Bobcat V6.0 installed and it is poor for signal also.
Is there a reason for this and if it is to do with the modem, which is the best modem I can use on o2 in the UK for my i9505?
I would leave Google on my phone but the Google rom doesn't have separate volume control for notification and ring which doesn't work for me. I need this to be separate.