Procedure:
1. Download E5186 Toolbox
2. Extact then open yung toolbox, lagay ung ip sa taas pati ung password ng modem nyo. then connect.
3. Makikita nyo sa Network Band walang 2500Mhz. Para maselect yung 2500mhz select API Control Tab>/api/net/net-mode then click Get button.
4. Under Write to API, Palitan nyo ung yung nasa loob ng LTE Band ng 10000000000 hex of Band 41 which is 2500mhz.
eg.
<request>
<NetworkMode>03</NetworkMode>
<NetworkBand>3FFFFFFF</NetworkBand>
<LTEBand>10000000000</LTEBand>
</request>
After mapalitan click Write directly to API. Click YES. Done!
Bali na change na to 2500mhz ung frequncy ng modem. Kung meron 2500mhz sa lugar masasagap nyo un.
credit kay
TresMarias