There are 'secret codes' that can be helpful when it comes to technical info about your smartphone. Many times they aren't in the user manual. I know, I was like 'What user manual?' I know you read your manual right? This list is supposed to contain helpful codes for iPhone and Android users. Here are a couple I think are helpful ...
iPhone code that's a hack from Tom's Guide to stop Outgoing Calls:
Dial *33* and enter a PIN of your choice with a # afterward. Tap the green dial button. After receiving a confirmation, hit dismiss.
Android code to Block Your Identity:
Turn on Caller ID by pressing *31# and turn it off by dialing #31#
Listen to Mix 94.7
The #1 suggestion is cleaning up your phone for more storage, which I need to do with my photo gallery. Text too ... I need to find the codes for those tasks.