iPhone 6S 'no sim card' after charging port replacement
I'm having quite some trouble replacing the charging port on an iPhone 6S. I have 2 devices with a broken port, I replaced the flex cables just like in the previous models, no big deal. But both devices started acting really strange:
When no SIM card is installed, the device continuously displays the 'no sim card installed' dialog, with intervals of 10 seconds.
When a SIM card is installed, it searches for signal for half a minute, then it just displays 'No signal' in the corner. Also, when going to settings, the carrier - option continuously appears and disappears from the menu.
All symptoms disappear and the SIM card functionality returns after disconnecting the charging port or plugging the old (OEM) charging port back in.
Does anyone have any idea how to get around this issue?