Your IMEI number is necessary in order to properly switch phone services. It can easily be found in your phone's setting. 

Apple

1. Open Settings
2. Tap General
3. Tap About
4. Scroll down to locate the IMEI number

Samsung

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Motorola

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Google

1. From the Home screen, swipe up to display all apps
2. Tap Settings
3. Tap System
4. Tap About Phone
5. Tap MEID
6. Scroll down to locate the IMEI number

LG

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

ZTE Smart

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Hawauai

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

BLU

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Huawei

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Alcatel

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

HTC

1. From the Home screen, open Apps
2. Tap Settings
3. Tap System
4. Tap About Device
5. Tap Phone Identity
6. Scroll down to locate the IMEI number

Sony

1. From the Home screen, open Apps
2. Tap Settings
3. Tap About Device
4. Tap Status
5. Tap IMEI information
6. Scroll down to locate the IMEI number

Blackberry

BlackBerry 6 & BlackBerry 7 OS

1. From the Home screen, tap Options
2. Tap Device
3. Tap Device Status Information
4. Scroll down to locate the IMEI number

BlackBerry Device Software 5.0 and below

1. From the Home screen, tap Options
2. Tap Status
3. Scroll down to locate the IMEI number

Kyocera

1. From the Home screen, tap All Apps
2. Tap Settings
3. Scroll to ‘SYSTEM,’ then tap About phone
4. Tap Status
5. Scroll down to locate the IMEI number

ZTE Flip

1. From the home screen, press MENU
2. Select Settings
3. Select Phone information
4. Scroll down to locate the IMEI number