Selecting a 4G or LTE network

1. Tap on applications icon.
2. Tap on settings icon.
3. Tap on SIM cards.
4. Tap on mobile data.
5. Tap on Operator 1 or Operator 2.
6. Tap on back.
7. Tap on more.
8. Tap on mobile networks.
9. Tap on Operator 1 or Operator 2 tab.
10. Tap on preferred network type.
11. Tap on GSM / WCDMA / LTE.
12. Tap on home.