Here is a concise summary of the text:
**15 Hidden Phone Functions Revealed**
A video exposes 15 unknown phone functions accessible via specific key combinations. Here are the summarized functions, grouped by platform where applicable:
**All/Both (iPhone & Android):**
1. **Hide Number**: `#31#` + phone number (outgoing calls)
2. **IMEI Number**: `*#06#` (device ID)
**iPhone Only:**
3. **Toggle Number Identification**: `*#30#`
4. **Cancel Outgoing Calls**: `*33*#`
5. **Call Waiting**: `*43#` + Call button
6. **Service Center Number**: `*5005*7672#`
7. **Improve Communication Quality** (reduces battery life): `*3370#`
8. **Call Forwarding to Voicemail**: `*21#`
**Android Only:**
9. **Instant Factory Reset**: `*#*#7780#*#*`
10. **Complete Reinstallation**: `*2767*3855#`
11. **Listen to Last 20 Calls**: `*#*#8351#*#*`
12. **Quick Shutdown**: `*#*#7594#*#*`
**Samsung Galaxy Only:**
13. **Quick Service Menu**: `*#0011#`
**General:**
14. **Signal Level Info (iPhone)**: `*3001#12345#*` + steps
15. **Statistics and Secret Menu (Android, varies by device)**: `*#*#4636#*#*`
Here are the key facts extracted from the text, each with a number and in short sentence form, excluding opinions:
**Phone Functions and Codes**
1. **IMEI Number**: Dial `*#06#` to find your International Mobile Equipment Identification Number (works on both iPhone and Android).
2. **Hide Caller ID**: On iPhone, dial `*#30#` to toggle caller ID on/off.
3. **Factory Reset (Android)**: Dial `*#*#7780#*#*` to instantly reset your Android phone to factory settings.
4. **Full Reinstallation (Android)**: Dial `*2767*3855#` to reset all parameters and reinstall built-in programs (irreversible).
5. **Improve Communication Quality (iPhone)**: Dial `*3370#` to enable encoding (reduces battery life).
6. **Listen to Own Voice Recordings (Android)**: Dial `*#*#8351#*#*` to listen to your last 20 phone calls.
7. **Service Center Number (iPhone)**: Dial `*5005*7672#` to find your service provider's service center number.
8. **Quick Shutdown (Android)**: Dial `*#*#7594#*#*` to turn off your phone instantly.
9. **Call Waiting (iPhone)**: Dial `*43#` to enable call waiting and switch between calls.
10. **Quick Service Menu (Samsung Galaxy)**: Dial `*#0011#` for quick access to the service menu.
11. **Signal Level (iPhone)**: Dial `*3001#12345#*` and then press/handle the power button to see the signal level in dBm.
12. **Call Forwarding to Voicemail (iPhone)**: Dial `*21#` to forward incoming calls to voicemail.
13. **Hide Number for Outgoing Calls**: Dial `#31#` followed by your phone number (works on both iPhone and Android).
14. **Statistics and Secret Menu**: Dial `*#*4636#*#*` (functions vary by device, works on Android and Motorola).
15. **Cancel Outgoing Calls (iPhone)**: Dial `*33#` to disable outgoing calls.