The merc attaches the microchip to a simple two-strip 3-point buss instead of a six-pad socket on the circuit board in Jaime's arm, so the 3 terminals on each side of the 6-pin chip would be shorted out.
As one of Jamie's upgrades she has night vision and a targeting grid in her eye. How? She has a bionic ear, Steve has the bionic eye.
Steve asks Jaime if they can "talk about children", yet Jaime is in her mid-40's by that time, so conceivably she would be past child-bearing age.
In the shot of Jaime's house before the new chip is inserted in her arm, the bright round reflection of a movie-light can be seen passing across an upstairs window.
(Around 39:38) When the soldiers are trying to sneak into the embassy and mercenary sets off the defensive charges, can clearly see the catapults used to toss the stuntman solders during the explosions.
When the NEC team arrive, the film crew is reflected in the side of the truck. The scene continues with men with full-body suits with reflective faceplates, in which the crew is again reflected.
The guard tells the mercs in the NEC van to back up the van instead of letting it through, yet in the next shot, the van is seen exiting the compound.
Jaime is shown with a wedding band on her left hand, yet there is no scene showing Steve putting the ring on her finger.