If you’re sending or receiving large amounts our team of experts are ready to help with every step of your transfer. Sometimes the discrepancy is so large (libre reading too low) that XDrip+ refuses to calibrate it (as minimal value from the sensor would be above the hypo warning level) https://www.saludcapital.gov.co/sitios/VigilanciaSaludPublica/Lists/Contactenos/DispForm.aspx?ID=2972663