An Unstructured Supplementary Service Data (USSD) code may be a code that’s programmed into your SIM card or your cell phone to form it easier to perform certain actions. Once you know the code for what you would like to try to, you’ll run it with a few simple taps.
Part 1 Running a USSD Code
- Open the phone app. This app are often found on your home screen, on the “All Apps” screen, or, on simpler cell phones, on the lock screen.
- Dial the USSD code. Some start with *, others #, et al. *#.
- Dial #. Make the call . When the code is running, you’ll see “Please wait…” (iPhone) or USSD code running… (Android) or something similar on the phone screen. If the code is invalid, you’ll get an error.
Part 2 Knowing What Codes to Run
- Check your IMEI. the foremost common reason why USSD codes are useful is because you’ll check crucial information about your phone. to see your IMEI, dial *#06# and therefore the IMEI will automatically pop up on your screen.
- Change your SIM PIN. Dial *04 followed by the old PIN, then *, followed by the new PIN, then *, followed by the new PIN again, then #. for example, to vary the PIN from 1234 to 4321, dial *04123443214321#.
- Check information about your carrier, like how much data you’ve got left. This code will vary from carrier to carrier. On AT&T, the code for checking how much data you’ve got left is 3282# (DATA#).
- Enter field trial mode on iPhone. to do that, dial 3001#12345# and call the number. Here, you’ll view information about your SIM card and your phone.
- study other USSD codes. Read the Wikipedia article on it, also as conduct research on your carrier’s website fo USSD codes that pertain specifically to it.