diff --git a/broadcastradio/common/utils2x/Utils.cpp b/broadcastradio/common/utils2x/Utils.cpp
index e0337b4..d825a7a 100644
--- a/broadcastradio/common/utils2x/Utils.cpp
+++ b/broadcastradio/common/utils2x/Utils.cpp
@@ -89,6 +89,18 @@
     return IdentifierIterator(sel) + 1 /* primary id */ + sel.secondaryIds.size();
 }
 
+FrequencyBand getBand(uint64_t freq) {
+    // keep in sync with
+    // frameworks/base/services/core/java/com/android/server/broadcastradio/hal2/Utils.java
+    if (freq < 30) return FrequencyBand::UNKNOWN;
+    if (freq < 500) return FrequencyBand::AM_LW;
+    if (freq < 1705) return FrequencyBand::AM_MW;
+    if (freq < 30000) return FrequencyBand::AM_SW;
+    if (freq < 60000) return FrequencyBand::UNKNOWN;
+    if (freq < 110000) return FrequencyBand::FM;
+    return FrequencyBand::UNKNOWN;
+}
+
 static bool bothHaveId(const ProgramSelector& a, const ProgramSelector& b,
                        const IdentifierType type) {
     return hasId(a, type) && hasId(b, type);
@@ -194,7 +206,7 @@
     return false;
 }
 
-static bool isValid(const ProgramIdentifier& id) {
+bool isValid(const ProgramIdentifier& id) {
     auto val = id.value;
     bool valid = true;
 
@@ -209,8 +221,10 @@
         case IdentifierType::INVALID:
             expect(false, "IdentifierType::INVALID");
             break;
-        case IdentifierType::AMFM_FREQUENCY:
         case IdentifierType::DAB_FREQUENCY:
+            expect(val > 100000u, "f > 100MHz");
+        // fallthrough
+        case IdentifierType::AMFM_FREQUENCY:
         case IdentifierType::DRMO_FREQUENCY:
             expect(val > 100u, "f > 100kHz");
             expect(val < 10000000u, "f < 10GHz");
diff --git a/broadcastradio/common/utils2x/include/broadcastradio-utils-2x/Utils.h b/broadcastradio/common/utils2x/include/broadcastradio-utils-2x/Utils.h
index bac11fd..e3134f7 100644
--- a/broadcastradio/common/utils2x/include/broadcastradio-utils-2x/Utils.h
+++ b/broadcastradio/common/utils2x/include/broadcastradio-utils-2x/Utils.h
@@ -27,6 +27,14 @@
 namespace broadcastradio {
 namespace utils {
 
+enum class FrequencyBand {
+    UNKNOWN,
+    FM,
+    AM_LW,
+    AM_MW,
+    AM_SW,
+};
+
 V2_0::IdentifierType getType(uint32_t typeAsInt);
 V2_0::IdentifierType getType(const V2_0::ProgramIdentifier& id);
 
@@ -64,6 +72,16 @@
 IdentifierIterator end(const V2_0::ProgramSelector& sel);
 
 /**
+ * Guesses band from the frequency value.
+ *
+ * The band bounds are not exact to cover multiple regions.
+ * The function is biased towards success, i.e. it never returns
+ * FrequencyBand::UNKNOWN for correct frequency, but a result for
+ * incorrect one is undefined (it doesn't have to return UNKNOWN).
+ */
+FrequencyBand getBand(uint64_t frequency);
+
+/**
  * Checks, if {@code pointer} tunes to {@channel}.
  *
  * For example, having a channel {AMFM_FREQUENCY = 103.3}:
@@ -105,6 +123,7 @@
  */
 bool isSupported(const V2_0::Properties& prop, const V2_0::ProgramSelector& sel);
 
+bool isValid(const V2_0::ProgramIdentifier& id);
 bool isValid(const V2_0::ProgramSelector& sel);
 
 V2_0::ProgramIdentifier make_identifier(V2_0::IdentifierType type, uint64_t value);