QUOTE(clement5949 @ Mar 13 2018, 09:32 AM)
bro, i also thinking to use it as secondary phone.
the spec u having now, didnt realize lag when opening any app?
let me give u one scenario and see whether u face lag or not
1. u will have fb, instagram and fb messenger in this phone
2. u will turn off the wifi in the night before sleep
3. morning u wake up, u turn on the wifi or data
4. all notification blasted to u
because my 4y old galaxy s5 (secondary phone that flashed with pure android rom) got damn lag with the scenario above

I PMed you bro.
1. There's no lag using FB or FB Messenger. I don't use Instagram, so I wouldn't know.
2. Nope, I don't turn off anything when I sleep. Just put it in power saving mode. The battery drain is about 2% overnight which is fine.
3. See above

4. Yes, all notifications on, but bear in mind this is my secondary phone, so I don't use WhatsApp or company email on it. Just Gmail.