9930 on Sprint letting me down with emails!

For the past two I haven't been receiving emails from time to time or the have come hours late. Today I noticed I hadn't reeived any email for some time. Didn't have the BB dots next to the 3G icon. Did a battery pull and presto, phone down loaded 10 emails. Yesturday I did have the dots and 3G and got 3 email 5 hours after they were sent. Luckly I got them in my pc. Smae thing last week several times. Is it Blackberry? Sprint? My phone? Running stock OS. No new apps. This can't continue.

Oh. I did send Service Books yesterday and last week. Forgot to mention.