diff --git a/sysmocom/resources.conf.prod b/sysmocom/resources.conf.prod
index 0444cf43..461ada95 100644
--- a/sysmocom/resources.conf.prod
+++ b/sysmocom/resources.conf.prod
@@ -212,43 +212,57 @@ modem:
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sms', 'voice', 'ussd', 'sim']
 
+- label: sierra_3rd
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.2'
+  ki: '97E2DAF5841D011F134E048E3B36D109'
+  auth_algo: 'comp128v1'
+  ciphers: [a5_0, a5_1]
+  features: ['2g', 'sms', 'voice', 'ussd', 'sim']
+
+- label: sierra_4th
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.3'
+  ki: '6F7B518177DD550BDDDF1C9087BF4E48'
+  auth_algo: 'comp128v1'
+  ciphers: [a5_0, a5_1]
+  features: ['2g', 'sms', 'voice', 'ussd', 'sim']
+
 - label: gobi2k
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.4/1-5.4.1/1-5.4.1.5'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.2/1-5.2.5'
   ki: '5752B3F43277C35D2D1D957007DF74E2'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sim']
 
 - label: ec20_1
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.4/1-5.4.1/1-5.4.1.6'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.2/1-5.2.6'
   ki: '07F35D0A9476646169669401215580E0'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sms', 'voice', 'ussd', 'gprs', 'sim']
 
 - label: ec20_2
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.2'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.1/1-5.1.2'
   ki: '278B899D126C31F3B24D21E3EB556530'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sms', 'voice', 'ussd', 'gprs', 'sim']
 
 - label: ec20_3
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.3'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.1/1-5.1.3'
   ki: 'B43BBCD8DE4D594F4146DE3D8ADC589D'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sms', 'voice', 'ussd', 'gprs', 'sim']
 
 - label: ec20_4
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.5'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.1/1-5.1.5'
   ki: 'A41F06F39DE3B0295C178A674D3E3636'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]
   features: ['2g', 'sms', 'voice', 'ussd', 'gprs', 'sim']
 
 - label: ec20_5
-  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.3/1-5.3.6'
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.1/1-5.1.6'
   ki: '8CCBE85A62C6DC7AC2A9886F4BBC3146'
   auth_algo: 'comp128v1'
   ciphers: [a5_0, a5_1]