i said about my iphone had iphone problems.
already try restore – re jail – change from cydia to rock but everything good until i re sync.
i forgot one option
delete all app
found that this make sense?
may be some program take response on took over control my iphone, not me.
so now it’s obvious faster, connect wifi with very stable, and no lagging anymore
for whom try to find out what happen with your iphone, try remove most unnecessary app.
it may help.