1. Things To Check your cell phone frequency before purchase

Things Pre-purchase Check:

1. The booster can only amplify the signal, it can’t create a signal. If there is no outside signal, the booster will not work for you. Please make sure you can make call successfully outside your house.
2. The booster can work only if your cell phone works on the same frequency band as the booster. Please check which band your cell phone uses firstly using the methods below:

• For iPhone:

1. Dial *3001#12345#*, then the press Call button
2. Click ‘Serving Cell Info’
3. Check ‘Freq Band Indicator’;

• For Android phone:

Download and install the app: LTE Discovery, tap ‘SIGNALS’ and check band number.