I have a iPhone 4 and I have been having an odd problem where the iPhone won’t push emails sometimes and it has to be on wireless for it to push. it is struggling catching up from switching from phone to Wi-Fi and almost won’t even connect or check mail on the phone. I use my phone a ton for email, apps, ect. Sometimes, I am checking my inbox constantly. For some reason, sometimes it takes me going to my mailbox to actually get the email(by it checking manually and not pushing) and I loose out on seeing messages that are possible extremely important. Push is enabled on my phone and I am not fetching data. This is an exchange account.

Any ideas?