diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5143a0..c963f34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,17 @@ every change carries a descriptive commit message.
 
 ## [Unreleased]
 
+## [3.40.1] — 2026-10-26
+
+### Changed
+
+- **File filter: drop the "SMS-related" / "CB-related" categories.**  Those
+  files are service-declared and already reachable through their per-service
+  filter options, which carry the per-spec service names ("Short Message
+  Storage (SMS)", "SMS Parameters (SMSP)", "Short Message Status Reports
+  (SMSR)", "Cell Broadcast Message Identifier (CBMI)", "Cell Broadcast
+  Message Identifier Ranges (CBMIR)").
+
 ## [3.40.0] — 2026-10-26
 
 ### Added
diff --git a/frontend/index.html b/frontend/index.html
index feca927..e6df90a 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -1989,7 +1989,7 @@
 // ===== Version =====
 // Single source of truth for the PWA version: shown in the header and used
 // by the server version check in pysimConnect().
-const SIMPLE_VERSION = '3.40.0';
+const SIMPLE_VERSION = '3.40.1';
 document.getElementById('app-version').textContent = 'v' + SIMPLE_VERSION;
 
 // ===== view history (the browser Back/Forward buttons) =====
@@ -16094,8 +16094,8 @@ function pysimFsSetSort(mode) {
 // can belong to several criteria (EF.SPN is a provider name and the file of
 // the "Service Provider Name" service).  `all` is the exclusive default.
 // The categories are shown under three headings (`group`): the subscriber
-// data, the network-selection data, and services (the SMS files plus one
-// option per file-backed feature of the service cross-reference).
+// data, the network-selection data, and services (one option per file-backed
+// feature of the service cross-reference).
 const FS_FILTER_ALL = 'all';
 // "Custom files" is not a name-based criterion: it matches the injected
 // custom-file nodes by their `custom` flag (user-chosen names).
@@ -16111,12 +16111,6 @@ const FS_FILTER_GROUPS = [
 	{ id: 'wlan', label: 'WLAN / I-WLAN', group: 'PLMN', files: [
 		'EF.UPLMNWLAN', 'EF.OPLMNWLAN', 'EF.WRI', 'EF.HWSIDL', 'EF.WEHPLMNPI', 'EF.WHPI',
 		'EF.WLRPLMN', 'EF.HPLMNDAI'] },
-	// EF.PSISMSC is a standard name pySim does not model, so it has no tree
-	// node to match - it stays listed for completeness.
-	{ id: 'sms', label: 'SMS-related', group: 'Services', files: [
-		'EF.SMS', 'EF.SMSS', 'EF.SMSP', 'EF.SMSR', 'EF.PSISMSC'] },
-	{ id: 'cb', label: 'CB-related', group: 'Services', files: [
-		'EF.CBMI', 'EF.CBMID', 'EF.CBMIR'] },
 ];
 const FS_FILTER_GROUP_ORDER = ['Identifiers', 'PLMN', 'Services'];
 
@@ -28111,8 +28105,6 @@ const LANG_RU = {
 	'PLMN selection': 'Выбор PLMN',
 	'Provider names': 'Имена операторов',
 	'WLAN / I-WLAN': 'WLAN / I-WLAN',
-	'SMS-related': 'Связанное с SMS',
-	'CB-related': 'Связанное с CB',
 	'Custom files': 'Пользовательские файлы',
 	'Selected: {n}': 'Выбрано: {n}',
 	'Expand all': 'Развернуть все',
diff --git a/frontend/sw.js b/frontend/sw.js
index a0d6f93..9725a87 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'simple-v485';
+const CACHE = 'simple-v486';
 const URLS = [
   'index.html',
   'help.html',
diff --git a/frontend/tests/fs_filter.test.js b/frontend/tests/fs_filter.test.js
index b6bc490..b71123b 100644
--- a/frontend/tests/fs_filter.test.js
+++ b/frontend/tests/fs_filter.test.js
@@ -173,9 +173,9 @@ test('an outside click or Escape closes the menu', () => {
 	assert.match(key[1], /pysimFsFilterToggle\(false\)/);
 });
 
-test('the six category groups name their files', () => {
+test('the four category groups name their files', () => {
 	assert.deepStrictEqual(FS_FILTER_GROUPS.map(g => g.id),
-		['identifiers', 'plmn-selection', 'provider-names', 'wlan', 'sms', 'cb']);
+		['identifiers', 'plmn-selection', 'provider-names', 'wlan']);
 	const files = id => new Set(FS_FILTER_GROUPS.find(g => g.id === id).files);
 	assert.deepStrictEqual([...files('identifiers')],
 		['EF.ICCID', 'EF.IMSI', 'EF.MSISDN', 'EF.IMPI', 'EF.IMPU', 'EF.SUPI_NAI', 'EF.GID1', 'EF.GID2']);
@@ -187,8 +187,6 @@ test('the six category groups name their files', () => {
 	assert.deepStrictEqual([...files('wlan')],
 		['EF.UPLMNWLAN', 'EF.OPLMNWLAN', 'EF.WRI', 'EF.HWSIDL', 'EF.WEHPLMNPI', 'EF.WHPI',
 			'EF.WLRPLMN', 'EF.HPLMNDAI']);
-	assert.deepStrictEqual([...files('sms')], ['EF.SMS', 'EF.SMSS', 'EF.SMSP', 'EF.SMSR', 'EF.PSISMSC']);
-	assert.deepStrictEqual([...files('cb')], ['EF.CBMI', 'EF.CBMID', 'EF.CBMIR']);
 	assert.strictEqual(FS_FILTER_ALL, 'all');
 	assert.strictEqual(FS_FILTER_CUSTOM, 'custom');
 });
@@ -212,12 +210,12 @@ test('the inverted index keys the uppercased names and merges memberships', () =
 	assert.ok(ids('EF.PLMNwAcT').includes('plmn-selection'));
 	assert.ok(ids('EF.SPN').includes('provider-names'));
 	assert.ok(ids('EF.SPN').includes('svc:Service Provider Name (SPN)'));
-	assert.ok(ids('EF.SMS').includes('sms'));
+	// SMS/CB files are covered by their per-service options, not a category
 	assert.ok(ids('EF.SMS').includes('svc:Short Message Storage (SMS)'));
-	assert.ok(ids('EF.CBMI').includes('cb'));
-	// EF.PSISMSC is only listed by the SMS category - pySim models no such
-	// file, so it never matches a tree node (no service lists it either)
-	assert.deepStrictEqual([...idx.get('EF.PSISMSC')], ['sms']);
+	assert.ok(ids('EF.CBMI').includes('svc:Cell Broadcast Message Identifier (CBMI)'));
+	// EF.PSISMSC is neither a category nor a file-backed service, so nothing
+	// maps it (pySim models no such file, and no service lists it either)
+	assert.ok(!idx.has('EF.PSISMSC'));
 	assert.ok(!fileBackedFeatures().some(n => (SERVICES_FS_MAP[n] || []).includes('EF.PSISMSC')));
 });
 
@@ -232,12 +230,12 @@ test('a file matches the selected categories, case-insensitively', () => {
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.SPN' }), true);
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.PNN' }), false);
 	});
-	withFilter(['identifiers', 'sms'], () => {
+	withFilter(['identifiers', 'svc:Short Message Status Reports (SMSR)'], () => {
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.IMSI' }), true);
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.SMSR' }), true);
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.SPN' }), false);
 	});
-	withFilter(['sms'], () => {
+	withFilter(['svc:Short Message Storage (SMS)'], () => {
 		assert.strictEqual(pysimFsFilterMatch({ name: 'EF.ECC' }), false);
 	});
 });
@@ -320,8 +318,8 @@ test('a directory shows only on the path of a file the filter selects', () => {
 		assert.strictEqual(pysimFsFilterShow(t.usim), true);   // EF.IMSI/EF.MSISDN copies
 		assert.strictEqual(pysimFsFilterShow(t.wlan), false);
 	});
-	withFilter(['cb'], () => {
-		assert.strictEqual(pysimFsFilterShow(t.gsm), true);      // EF.CBMI/CBMID/CBMIR
+	withFilter(['svc:Cell Broadcast Message Identifier (CBMI)'], () => {
+		assert.strictEqual(pysimFsFilterShow(t.gsm), true);      // EF.CBMI
 		assert.strictEqual(pysimFsFilterShow(t.telecom), false);
 		assert.strictEqual(pysimFsFilterShow(t.wlan), false);
 	});
@@ -377,13 +375,11 @@ test('the standard list gives a name every tree it lives in', () => {
 });
 
 test('the selection resolves to the paths of its files', () => {
-	withFilter(['cb'], () => {
+	withFilter(['svc:Cell Broadcast Message Identifier (CBMI)'], () => {
 		const paths = pysimFsFilterMatchingPaths();
 		assert.ok(paths instanceof Set, 'expected a Set');
 		assert.deepStrictEqual(Array.from(paths).sort(), [
-			'ADF.USIM-NON-IMSI/6F45', 'ADF.USIM-NON-IMSI/6F48', 'ADF.USIM-NON-IMSI/6F50',
-			'ADF.USIM/6F45', 'ADF.USIM/6F48', 'ADF.USIM/6F50',
-			'MF/7F20/6F45', 'MF/7F20/6F48', 'MF/7F20/6F50',
+			'ADF.USIM-NON-IMSI/6F45', 'ADF.USIM/6F45', 'MF/7F20/6F45',
 		]);
 		// cached for the same selection
 		assert.strictEqual(pysimFsFilterMatchingPaths(), paths);
@@ -429,7 +425,8 @@ test('the menu lists all, custom, the three headings and the services', () => {
 	// the categories sit under their headings
 	assert.ok(out.indexOf('data-filter="provider-names"') < out.indexOf('>PLMN</div>'));
 	assert.ok(out.indexOf('data-filter="plmn-selection"') > out.indexOf('>PLMN</div>'));
-	assert.ok(out.indexOf('data-filter="sms"') > out.indexOf('>Services</div>'));
+	// the per-service options sit under the Services heading
+	assert.ok(out.indexOf('data-filter="svc:') > out.indexOf('>Services</div>'));
 	const boxes = renderedBoxes();
 	assert.strictEqual(boxes.length, 2 + FS_FILTER_GROUPS.length + fsFilterServiceOptions().length);
 	assert.strictEqual(boxes[0].id, 'all');
@@ -513,11 +510,11 @@ test('the button summary names the single entry or counts the selection', () =>
 	assert.strictEqual(summary(['all']), 'All');
 	// an empty selection also means everything
 	assert.strictEqual(summary([]), 'All');
-	assert.strictEqual(summary(['all', 'sms']), 'All');
+	assert.strictEqual(summary(['all', 'plmn-selection']), 'All');
 	assert.strictEqual(summary(['custom']), 'Custom files');
 	assert.strictEqual(summary(['plmn-selection']), 'PLMN selection');
 	assert.strictEqual(summary(['svc:Service Provider Name (SPN)']), 'Service Provider Name (SPN)');
-	assert.strictEqual(summary(['sms', 'cb']), 'Selected: 2');
+	assert.strictEqual(summary(['plmn-selection', 'wlan']), 'Selected: 2');
 	// an unknown id falls back to itself
 	assert.strictEqual(summary(['providers']), 'providers');
 });
@@ -550,18 +547,18 @@ test('the checkbox rows keep "all" exclusive and persist the selection', () => {
 	assert.strictEqual(_store.simple_fs_filter, '["all"]');
 	assert.strictEqual(_treeRenders, 1);
 	// choosing a category drops "all"
-	pysimFsFilterSetEntry('sms', true);
-	assert.deepStrictEqual([...pysimFsFilter], ['sms']);
-	assert.strictEqual(_store.simple_fs_filter, '["sms"]');
+	pysimFsFilterSetEntry('provider-names', true);
+	assert.deepStrictEqual([...pysimFsFilter], ['provider-names']);
+	assert.strictEqual(_store.simple_fs_filter, '["provider-names"]');
 	assert.strictEqual(_treeRenders, 3);   // render + the auto-expand's render
-	assert.strictEqual(box('sms').checked, true);
+	assert.strictEqual(box('provider-names').checked, true);
 	assert.strictEqual(box('all').checked, false);
-	assert.strictEqual(dom.btn.textContent, 'SMS-related');
+	assert.strictEqual(dom.btn.textContent, 'Provider names');
 	// several categories stay selected
 	pysimFsFilterSetEntry('identifiers', true);
-	assert.deepStrictEqual([...pysimFsFilter], ['sms', 'identifiers']);
+	assert.deepStrictEqual([...pysimFsFilter], ['provider-names', 'identifiers']);
 	// unchecking one keeps the other
-	pysimFsFilterSetEntry('sms', false);
+	pysimFsFilterSetEntry('provider-names', false);
 	assert.deepStrictEqual([...pysimFsFilter], ['identifiers']);
 	// unchecking the last one restores the default
 	pysimFsFilterSetEntry('identifiers', false);
@@ -569,7 +566,7 @@ test('the checkbox rows keep "all" exclusive and persist the selection', () => {
 	assert.strictEqual(_store.simple_fs_filter, '["all"]');
 	assert.strictEqual(box('all').checked, true);
 	// "all" is exclusive even when another entry is selected
-	pysimFsFilter = new Set(['sms']);
+	pysimFsFilter = new Set(['provider-names']);
 	pysimFsFilterSetEntry('all', true);
 	assert.deepStrictEqual([...pysimFsFilter], ['all']);
 });
@@ -582,7 +579,7 @@ test('the saved selection is restored, defaulting to "all"', () => {
 	pysimFsFilterRestore();
 	assert.deepStrictEqual([...pysimFsFilter], ['providers', 'svc:Service Provider Name (SPN)']);
 	// `all` is exclusive; an empty or broken save falls back to it
-	_store.simple_fs_filter = JSON.stringify(['all', 'sms']);
+	_store.simple_fs_filter = JSON.stringify(['all', 'plmn-selection']);
 	pysimFsFilterRestore();
 	assert.deepStrictEqual([...pysimFsFilter], ['all']);
 	_store.simple_fs_filter = '[]';
@@ -636,7 +633,7 @@ test('the dropdown is re-rendered on language switch', () => {
 test('the filter labels have Russian entries', () => {
 	const dict = html.match(/const LANG_RU = \{([\s\S]*?)\n\};/)[1];
 	for (const key of ['All', 'Custom files', 'Identifiers', 'PLMN', 'Services', 'PLMN selection',
-		'Provider names', 'WLAN / I-WLAN', 'SMS-related', 'CB-related', 'Selected: {n}']) {
+		'Provider names', 'WLAN / I-WLAN', 'Selected: {n}']) {
 		assert.ok(dict.includes("'" + key + "':"), 'missing Russian entry: ' + key);
 	}
 });
diff --git a/pyproject.toml b/pyproject.toml
index bf2a989..fb78e70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.40.0"
+version = "3.40.1"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 license = { text = "GPL-2.0-or-later" }
 requires-python = ">=3.9"
diff --git a/pysim_simple_server/server.py b/pysim_simple_server/server.py
index d6a16e8..c4777f1 100644
--- a/pysim_simple_server/server.py
+++ b/pysim_simple_server/server.py
@@ -37,7 +37,7 @@ from osmocom.tlv import BER_TLV_IE
 from osmocom.utils import rpad
 
 
-VERSION = '3.40.0'
+VERSION = '3.40.1'
 
 MAX_ENVELOPE_SEGMENTS = 5  # max SMS segments for outgoing C-APDU in ENVELOPE