Moffett Field-based reQall has upgraded the firm's free reminder service, saying today that the firm now supports sending users reminders on cell phone, text messaging, instant messaging, email, or Web. The company also said that its system can also be used to send reminders to frineds and others. reQall's services allow users to call and leave a message for themselves, which is translated into reminder emails and notices. reQall competes against similar services from Jott, SpinVox, and others. reQall also has operations in Hyderabad, India.