E-mail and contacts from Facebook disappear since I use Iphone
Since I got an Iphone 3gs and started checking my e-mails and Facebook from it, some e-mails in Gmail and some Facebook contacts just disappear after a few minutes. Before this I didn't had any issues and I was using Ipad. I know checking my account from different devices can bring me trouble, but I just don't know how to fix this, and now my e-mails from Gmail disappear even when checking my account from a desktop or stationary computer. I am loosing many work important e-mails, help!
Just as an extra tip, I made me a Yahoo account, not connected to Gmail, so I could receive things from work, but the e-mails don't get there either.
Thanks!
iPhone 3GS, iOS 6.1.6