If your cell phone has email access (like an iPhone or Blackberry), you can definitely read and send mail on it using a Mailstore account. Use IMAP, so that you can access your same Inbox from your phone, computer and webmail!
If your phone does not have email access, you may be able to send email to your phone as text messages (SMS) if your cell phone provider has assigned your phone an email address. SMS is limited to 250 characters per message, so you probably don't want to just add your phone's email address to your forwarding list. We offer Pager Notification filters on Pobox Plus and Mailstore accounts, which allow you to specify the content or senders of messages we should send to your phone, and automatically trim the content of your message to reduce the number of characters used.