Gionee A1 Plus weight is 226 grams. It is mostly because of it's huge 6-Inch display size and humoungous 4550 mAh battery.
Yes, Gionee A1 Plus is a true 4G VoLTE mobile phone and you can use VoLTE without any problem.
Yes, Gionee A1 Plus does have the front camera LED flash.
No. Gionee A1 Plus video recording is restricted to 1080p resolution. You can record Full HD videos but you cannot record 4k videos.
Yes, Gionee A1 Plus has a 3.5 mm headphone jack.
The phone is very nice especially, if you are looking at bigger battery and large display. There is slight issue of heating while charging. Else the phone is very good for daily usage. I am very happy with my purchase at Onlymobiles.