diff --git a/src/osmo_gsm_tester/obj/ms.py b/src/osmo_gsm_tester/obj/ms.py
index cd4a8a11..1ee9ef83 100644
--- a/src/osmo_gsm_tester/obj/ms.py
+++ b/src/osmo_gsm_tester/obj/ms.py
@@ -32,7 +32,9 @@ def on_register_schemas():
         'auth_algo': schema.AUTH_ALGO,
         'apn_ipaddr': schema.IPV4,
         'ciphers[]': schema.CIPHER_2G,
-        'features[]': schema.MODEM_FEATURE
+        'features[]': schema.MODEM_FEATURE,
+        'dl_earfcn': schema.UINT,
+        'ul_earfcn': schema.UINT
         }
     schema.register_resource_schema('modem', resource_schema)
 
diff --git a/src/osmo_gsm_tester/obj/ms_amarisoft.py b/src/osmo_gsm_tester/obj/ms_amarisoft.py
index 9b6d64a0..7e0cc135 100644
--- a/src/osmo_gsm_tester/obj/ms_amarisoft.py
+++ b/src/osmo_gsm_tester/obj/ms_amarisoft.py
@@ -27,7 +27,16 @@ from .run_node import RunNode
 from .ms import MS
 
 def on_register_schemas():
-    resource_schema = {}
+    resource_schema = {
+        'use_custom_band255': schema.BOOL_STR,
+        'custom_band_list[].number': schema.UINT,
+        'custom_band_list[].dl_earfcn_min': schema.UINT,
+        'custom_band_list[].dl_earfcn_max': schema.UINT,
+        'custom_band_list[].dl_freq_min': schema.UINT,
+        'custom_band_list[].ul_freq_min': schema.UINT,
+        'custom_band_list[].ul_earfcn_min': schema.UINT,
+        'custom_band_list[].ul_earfcn_max': schema.UINT,        
+        }
     for key, val in RunNode.schema().items():
         resource_schema['run_node.%s' % key] = val
     schema.register_resource_schema('modem', resource_schema)
@@ -245,6 +254,9 @@ class AmarisoftUE(MS):
         config.overlay(values, dict(ue=dict(log_filename=logfile,
                                             ifup_filename=ifupfile)))
 
+        # Convert to Python bool and overlay config
+        config.overlay(values, dict(ue={'use_custom_band255': util.str2bool(values['ue'].get('use_custom_band255', 'false'))}))
+
         # We need to set some specific variables programatically here to match IP addresses:
         if self._conf.get('rf_dev_type') == 'zmq':
             base_srate = num_prb2base_srate(self.enb.num_prb())
diff --git a/src/osmo_gsm_tester/templates/amarisoft_lteue.cfg.tmpl b/src/osmo_gsm_tester/templates/amarisoft_lteue.cfg.tmpl
index 6f384918..f9b29334 100644
--- a/src/osmo_gsm_tester/templates/amarisoft_lteue.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/amarisoft_lteue.cfg.tmpl
@@ -30,9 +30,24 @@
      allow dynamic UE creation from remote API */
   multi_ue: true,
 
+  custom_freq_band: [
+%for band in ue.custom_band_list:
+    {
+      band: ${band.number},
+      dl_earfcn_min: ${band.dl_earfcn_min},
+      dl_earfcn_max: ${band.dl_earfcn_max},
+      dl_freq_min: ${band.dl_freq_min},
+      ul_freq_min: ${band.ul_freq_min},
+      ul_earfcn_min: ${band.ul_earfcn_min},
+      ul_earfcn_max: ${band.ul_earfcn_max},
+    },
+%endfor
+  ],
+
   cells: [
     {
-      dl_earfcn: 2850,
+      dl_earfcn: ${ue.dl_earfcn},
+      ul_earfcn: ${ue.ul_earfcn},
       n_antenna_dl: 1,
       n_antenna_ul: 1,
 
diff --git a/sysmocom/defaults.conf b/sysmocom/defaults.conf
index 39b81a80..8bbae422 100644
--- a/sysmocom/defaults.conf
+++ b/sysmocom/defaults.conf
@@ -192,6 +192,9 @@ amarisoftue:
   tx_gain: 89
   rx_gain: 60
   rf_dev_sync: none
+  custom_band_list: []
+  dl_earfcn: 2850
+  ul_earfcn: 20850
 
 iperf3cli:
   time: 60