SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11 Handling and soldering Page 126 of 157
3.3.12 Use of ultrasonic processes
The cellular modules contain components which are sensitive to ultrasonic waves. Use of any ultrasonic
processes (cleaning, welding etc.) may cause damage to the module.
☞ u-blox gives no warranty against damages to the cellular modules caused by any ultrasonic processes.