Yes, Gionee A1 Plus has a 3.5 mm headphone jack.
Yes, Gionee A1 Plus does have a hybrid sim slot.
Thanks to Quick Charging support, it takes just less than 2 hours to fully charge the huge battery of 4550 mAh of Gionee A1 Plus.
Gionee A1 Plus is a fully metal body phone and it does support fast charging, too. Besides, it has huge 4550 mAh battery. So, you may notice a minor heat issue while charging the same but otherwise there were no heat issues reported during our review.