diff --git a/sdk/@launchdarkly/observability-react-native/src/client/ContextKeys.test.ts b/sdk/@launchdarkly/observability-react-native/src/client/ContextKeys.test.ts
new file mode 100644
index 0000000000..29cc2b05c6
--- /dev/null
+++ b/sdk/@launchdarkly/observability-react-native/src/client/ContextKeys.test.ts
@@ -0,0 +1,300 @@
+import type { ReadableLogRecord } from '@opentelemetry/sdk-logs'
+import type { ReadableSpan } from '@opentelemetry/sdk-trace-base'
+import { ObservabilityClient } from './ObservabilityClient'
+import { InstrumentationManager } from './InstrumentationManager'
+import { CustomLogExporter } from '../otel/CustomLogExporter'
+import { CustomTraceExporter } from '../otel/CustomTraceExporter'
+import { Observability } from '../plugin/observability'
+import { _LDObserve } from '../sdk/LDObserve'
+import {
+	afterAll,
+	beforeAll,
+	beforeEach,
+	describe,
+	expect,
+	it,
+	vi,
+} from 'vitest'
+
+// Local endpoints that fail fast (connection refused) so nothing reaches the
+// network.
+const localOptions = {
+	projectId: 'test-project-id',
+	serviceName: 'test-service',
+	backendUrl: 'http://127.0.0.1:1',
+	otlpEndpoint: 'http://127.0.0.1:1',
+	serviceVersion: '1.0.0',
+	resourceAttributes: {},
+	customHeaders: {},
+	sessionTimeout: 15 * 60 * 1000,
+	debug: false,
+	disableErrorTracking: false,
+	disableLogs: false,
+	disableTraces: false,
+	disableMetrics: true,
+	tracingOrigins: false as const,
+	urlBlocklist: [],
+	networkRecording: {},
+	contextFriendlyName: () => undefined,
+	flagExposureDedupeWindowMillis: 0,
+	flagExposureDedupeMaxSize: 2000,
+	maxBufferSize: 1000,
+	uploadIntervalMillis: 10 * 60 * 1000,
+}
+
+const USER_KEY = 'context.contextKeys.user'
+const DEVICE_KEY = 'context.contextKeys.device'
+
+const exportedLogs: ReadableLogRecord[] = []
+const exportedSpans: ReadableSpan[] = []
+
+beforeAll(() => {
+	vi.spyOn(CustomLogExporter.prototype, 'export').mockImplementation(
+		(items, resultCallback) => {
+			exportedLogs.push(...items)
+			resultCallback({ code: 0 })
+		},
+	)
+	vi.spyOn(CustomTraceExporter.prototype, 'export').mockImplementation(
+		(items, resultCallback) => {
+			exportedSpans.push(...items)
+			resultCallback({ code: 0 })
+		},
+	)
+})
+
+beforeEach(() => {
+	exportedLogs.length = 0
+	exportedSpans.length = 0
+})
+
+const findSpan = (predicate: (span: ReadableSpan) => boolean) => {
+	const span = exportedSpans.find(predicate)
+	expect(span).toBeDefined()
+	return span!.attributes as Record<string, unknown>
+}
+
+const findLog = (body: string) => {
+	const log = exportedLogs.find((l) => l.body === body)
+	expect(log).toBeDefined()
+	return log!.attributes as Record<string, unknown>
+}
+
+describe('InstrumentationManager context keys', () => {
+	describe('store', () => {
+		it('prefixes each context kind', () => {
+			const manager = new InstrumentationManager(localOptions)
+			expect(manager.getContextKeyAttributes()).toEqual({})
+
+			manager.setContextKeyAttributes({ user: 'u1', device: 'd1' })
+			expect(manager.getContextKeyAttributes()).toEqual({
+				[USER_KEY]: 'u1',
+				[DEVICE_KEY]: 'd1',
+			})
+			expect(Object.isFrozen(manager.getContextKeyAttributes())).toBe(
+				true,
+			)
+		})
+
+		it('replaces the keys on each call', () => {
+			const manager = new InstrumentationManager(localOptions)
+			manager.setContextKeyAttributes({ user: 'u1', device: 'd1' })
+			manager.setContextKeyAttributes({ device: 'd2' })
+			expect(manager.getContextKeyAttributes()).toEqual({
+				[DEVICE_KEY]: 'd2',
+			})
+			manager.setContextKeyAttributes({})
+			expect(manager.getContextKeyAttributes()).toEqual({})
+		})
+
+		it('adds context keys to metrics alongside global attributes', () => {
+			const instrument = { record: vi.fn(), add: vi.fn() }
+			const meter = {
+				createGauge: vi.fn(() => instrument),
+				createCounter: vi.fn(() => instrument),
+				createHistogram: vi.fn(() => instrument),
+				createUpDownCounter: vi.fn(() => instrument),
+			}
+			const manager = new InstrumentationManager(localOptions)
+			;(manager as any).getMeter = () => meter
+			manager.setAttributes({ campaign: 'spring' })
+			manager.setContextKeyAttributes({ user: 'u1' })
+
+			const metric = { name: 'm', value: 2, attributes: { own: 'v' } }
+			const expected = { campaign: 'spring', [USER_KEY]: 'u1', own: 'v' }
+			manager.recordMetric(metric)
+			manager.recordHistogram(metric)
+			manager.recordCount(metric)
+			manager.recordIncr(metric)
+			manager.recordUpDownCounter(metric)
+			expect(instrument.record).toHaveBeenNthCalledWith(1, 2, expected)
+			expect(instrument.record).toHaveBeenNthCalledWith(2, 2, expected)
+			expect(instrument.add).toHaveBeenNthCalledWith(1, 2, expected)
+			expect(instrument.add).toHaveBeenNthCalledWith(2, 1, expected)
+			expect(instrument.add).toHaveBeenNthCalledWith(3, 2, expected)
+		})
+	})
+
+	describe('identify through the plugin', () => {
+		let client: ObservabilityClient
+		const [hook] = new Observability(localOptions).getHooks!({
+			sdk: { name: 'test-sdk', version: '1.0.0' },
+			mobileKey: 'mob-key',
+		} as any)
+
+		const identify = (context: any, status = 'completed') =>
+			hook.afterIdentify!({ context, timeout: 5 } as any, {}, {
+				status,
+			} as any)
+
+		beforeAll(async () => {
+			_LDObserve._resetForTesting()
+			// Identify before the SDK is initialized: the keys are buffered and
+			// applied, in order, once it loads.
+			identify({ kind: 'device', key: 'device-1' })
+			const buffered = _LDObserve
+				._getBufferStatus()
+				.buffer.map((e) => e.method)
+			expect(buffered).toEqual(['setContextKeys', 'recordLog'])
+
+			client = new ObservabilityClient('test-project-id', localOptions)
+			_LDObserve._init(client)
+			await vi.waitFor(
+				() => expect(_LDObserve.isInitialized()).toBe(true),
+				{ timeout: 2000 },
+			)
+		})
+
+		afterAll(async () => {
+			;(client as any).errorInstrumentation?.destroy?.()
+			await client.stop()
+			_LDObserve._resetForTesting()
+		})
+
+		it('applies keys from an identify made before init', async () => {
+			await client.flush()
+			expect(findLog('LD.identify')).toMatchObject({
+				[DEVICE_KEY]: 'device-1',
+				// The bare keys on the identify log are kept for back-compat.
+				device: 'device-1',
+			})
+
+			_LDObserve.recordLog('pre-login', 'info')
+			await client.flush()
+			const log = findLog('pre-login')
+			expect(log).toMatchObject({ [DEVICE_KEY]: 'device-1' })
+			expect(log).not.toHaveProperty(USER_KEY)
+		})
+
+		describe('after a multi-context identify', () => {
+			beforeAll(() => {
+				identify({
+					kind: 'multi',
+					user: { key: 'user-1' },
+					device: { key: 'device-1' },
+				})
+			})
+
+			const expected = { [USER_KEY]: 'user-1', [DEVICE_KEY]: 'device-1' }
+
+			it('adds keys to recordLog', async () => {
+				_LDObserve.recordLog('post-login', 'info', { own: 'v' })
+				await client.flush()
+				expect(findLog('post-login')).toMatchObject({
+					...expected,
+					own: 'v',
+				})
+			})
+
+			it('adds keys to recordError spans', async () => {
+				_LDObserve.recordError(new Error('boom-context'))
+				await client.flush()
+				expect(
+					findSpan(
+						(s) =>
+							s.attributes['exception.message'] ===
+							'boom-context',
+					),
+				).toMatchObject(expected)
+			})
+
+			it('adds keys to console.error spans', async () => {
+				console.error('boom-console-context')
+				await client.flush()
+				expect(
+					findSpan((s) =>
+						String(s.attributes['exception.message']).includes(
+							'boom-console-context',
+						),
+					),
+				).toMatchObject(expected)
+			})
+
+			it('adds keys to manual and track spans', async () => {
+				_LDObserve.startSpan('manual-context').end()
+				_LDObserve.track('signup-context')
+				await client.flush()
+				expect(
+					findSpan((s) => s.name === 'manual-context'),
+				).toMatchObject(expected)
+				expect(
+					findSpan(
+						(s) =>
+							s.name === 'track' &&
+							s.attributes.key === 'signup-context',
+					),
+				).toMatchObject(expected)
+			})
+
+			it('adds keys to flag evaluation spans', async () => {
+				hook.afterEvaluation!(
+					{ flagKey: 'context-flag', defaultValue: false } as any,
+					{},
+					{ value: true, variationIndex: 0, reason: null },
+				)
+				await client.flush()
+				expect(
+					findSpan(
+						(s) =>
+							s.attributes['feature_flag.key'] === 'context-flag',
+					),
+				).toMatchObject(expected)
+			})
+
+			it('adds keys to network spans', async () => {
+				const url = 'http://127.0.0.1:59999/context-keys'
+				await new Promise<void>((resolve) => {
+					const xhr = new XMLHttpRequest()
+					xhr.onloadend = () => resolve()
+					xhr.open('GET', url)
+					xhr.send()
+				})
+				const isXhrSpan = (s: ReadableSpan) =>
+					Object.values(s.attributes).some((v) => v === url)
+				await vi.waitFor(async () => {
+					await client.flush()
+					expect(exportedSpans.some(isXhrSpan)).toBe(true)
+				})
+				expect(findSpan(isXhrSpan)).toMatchObject(expected)
+			})
+		})
+
+		it('replaces keys on re-identify', async () => {
+			identify({ kind: 'user', key: 'user-2' })
+			_LDObserve.recordLog('re-identified', 'info')
+			await client.flush()
+			const log = findLog('re-identified')
+			expect(log).toMatchObject({ [USER_KEY]: 'user-2' })
+			expect(log).not.toHaveProperty(DEVICE_KEY)
+		})
+
+		it('sets keys even when identify does not complete', async () => {
+			identify({ kind: 'user', key: 'user-3' }, 'error')
+			_LDObserve.recordLog('identify-error', 'info')
+			await client.flush()
+			expect(findLog('identify-error')).toMatchObject({
+				[USER_KEY]: 'user-3',
+			})
+		})
+	})
+})
diff --git a/sdk/@launchdarkly/observability-react-native/src/client/InstrumentationManager.ts b/sdk/@launchdarkly/observability-react-native/src/client/InstrumentationManager.ts
index c660c5675b..ecc2a92242 100644
--- a/sdk/@launchdarkly/observability-react-native/src/client/InstrumentationManager.ts
+++ b/sdk/@launchdarkly/observability-react-native/src/client/InstrumentationManager.ts
@@ -73,10 +73,13 @@ export type InstrumentationManagerOptions = Required<ReactNativeOptions> & {
 // Span name for custom track events, matching the iOS/Android SDKs (`track`).
 const TRACK_SPAN_NAME = 'track'
 
+// Prefix for LaunchDarkly context keys, matching the web SDK.
+const CONTEXT_KEYS_ATTRIBUTE_PREFIX = 'context.contextKeys.'
+
 // Attribute namespaces the SDK sets itself; `setAttributes` ignores them.
 const RESERVED_ATTRIBUTE_PREFIXES = [
 	'highlight.',
-	'context.contextKeys.',
+	CONTEXT_KEYS_ATTRIBUTE_PREFIX,
 	'launchdarkly.',
 	'session.',
 ]
@@ -115,6 +118,8 @@ export class InstrumentationManager {
 	// Frozen snapshot of `_globalAttributes`, rebuilt on change so the telemetry
 	// hot path doesn't allocate.
 	private _globalAttributesSnapshot: Attributes = EMPTY_ATTRIBUTES
+	// Keys of the current LaunchDarkly context, replaced on each identify.
+	private _contextKeyAttributes: Attributes = EMPTY_ATTRIBUTES
 
 	constructor(
 		private options: Required<ReactNativeOptions> & {
@@ -182,10 +187,30 @@ export class InstrumentationManager {
 		return this._globalAttributesSnapshot
 	}
 
+	// Replaces the context key attributes with `context.contextKeys.<kind>`
+	// for each kind in `contextKeys` (e.g. `{ user: 'u1', device: 'd1' }`).
+	public setContextKeyAttributes(
+		contextKeys: Record<string, AttributeValue | undefined>,
+	): void {
+		const entries = Object.entries(contextKeys ?? {}).filter(
+			([, key]) => key !== undefined && key !== null,
+		)
+		this._contextKeyAttributes = entries.length
+			? Object.freeze(
+					Object.fromEntries(
+						entries.map(([kind, key]) => [
+							`${CONTEXT_KEYS_ATTRIBUTE_PREFIX}${kind}`,
+							key,
+						]),
+					),
+				)
+			: EMPTY_ATTRIBUTES
+	}
+
 	// LaunchDarkly context key attributes (`context.contextKeys.*`) for every
-	// span, log and metric. None are tracked yet.
+	// span, log and metric.
 	public getContextKeyAttributes(): Attributes {
-		return EMPTY_ATTRIBUTES
+		return this._contextKeyAttributes
 	}
 
 	// Attributes stamped on all telemetry by the processors and metric calls.
diff --git a/sdk/@launchdarkly/observability-react-native/src/client/ObservabilityClient.ts b/sdk/@launchdarkly/observability-react-native/src/client/ObservabilityClient.ts
index cc96bb4d3d..f919b0769b 100644
--- a/sdk/@launchdarkly/observability-react-native/src/client/ObservabilityClient.ts
+++ b/sdk/@launchdarkly/observability-react-native/src/client/ObservabilityClient.ts
@@ -316,6 +316,10 @@ export class ObservabilityClient {
 		this.instrumentationManager.removeAttributes(keys)
 	}
 
+	public setContextKeys(contextKeys: Attributes): void {
+		this.instrumentationManager.setContextKeyAttributes(contextKeys)
+	}
+
 	public track(
 		key: string,
 		properties?: TrackProperties,
diff --git a/sdk/@launchdarkly/observability-react-native/src/plugin/observability.ts b/sdk/@launchdarkly/observability-react-native/src/plugin/observability.ts
index 5426ed0761..1f2ad108c1 100644
--- a/sdk/@launchdarkly/observability-react-native/src/plugin/observability.ts
+++ b/sdk/@launchdarkly/observability-react-native/src/plugin/observability.ts
@@ -76,6 +76,10 @@ class TracingHook implements Hook {
 		data: IdentifySeriesData,
 		result: IdentifySeriesResult,
 	): IdentifySeriesData {
+		// Stamp the context keys on all telemetry from now on, matching the
+		// web SDK (which also sets them regardless of the identify status).
+		_LDObserve._setContextKeys(getContextKeys(hookContext.context))
+
 		if (result.status === 'completed') {
 			// The evaluation context changed, so previously recorded exposures
 			// are no longer relevant for deduplication. Only reset on a
diff --git a/sdk/@launchdarkly/observability-react-native/src/sdk/LDObserve.ts b/sdk/@launchdarkly/observability-react-native/src/sdk/LDObserve.ts
index fee5f44c68..d497ca40cd 100644
--- a/sdk/@launchdarkly/observability-react-native/src/sdk/LDObserve.ts
+++ b/sdk/@launchdarkly/observability-react-native/src/sdk/LDObserve.ts
@@ -111,6 +111,11 @@ class LDObserveClass
 		return this._bufferCall('removeAttributes', [keys])
 	}
 
+	// Internal: sets the LaunchDarkly context keys stamped on all telemetry.
+	_setContextKeys(contextKeys: Attributes): void {
+		return this._bufferCall('setContextKeys', [contextKeys])
+	}
+
 	track(
 		key: string,
 		properties?: TrackProperties,