diff --git a/furi/core/timer.c b/furi/core/timer.c
index 17347e5c..027e4cf4 100644
--- a/furi/core/timer.c
+++ b/furi/core/timer.c
@@ -122,17 +122,10 @@ FuriStatus furi_timer_stop(FuriTimer* instance) {
     furi_assert(instance);
 
     TimerHandle_t hTimer = (TimerHandle_t)instance;
-    FuriStatus stat;
 
-    if(xTimerIsTimerActive(hTimer) == pdFALSE) {
-        stat = FuriStatusErrorResource;
-    } else {
-        furi_check(xTimerStop(hTimer, portMAX_DELAY) == pdPASS);
-        stat = FuriStatusOk;
-    }
+    furi_check(xTimerStop(hTimer, portMAX_DELAY) == pdPASS);
 
-    /* Return execution status */
-    return (stat);
+    return FuriStatusOk;
 }
 
 uint32_t furi_timer_is_running(FuriTimer* instance) {
diff --git a/furi/core/timer.h b/furi/core/timer.h
index d27ef502..f8f40c56 100644
--- a/furi/core/timer.h
+++ b/furi/core/timer.h
@@ -32,6 +32,9 @@ FuriTimer* furi_timer_alloc(FuriTimerCallback func, FuriTimerType type, void* co
 void furi_timer_free(FuriTimer* instance);
 
 /** Start timer
+ *
+ * @warning    This is asynchronous call, real operation will happen as soon as
+ *             timer service process this request.
  *
  * @param      instance  The pointer to FuriTimer instance
  * @param[in]  ticks     The interval in ticks
@@ -41,6 +44,9 @@ void furi_timer_free(FuriTimer* instance);
 FuriStatus furi_timer_start(FuriTimer* instance, uint32_t ticks);
 
 /** Restart timer with previous timeout value
+ *
+ * @warning    This is asynchronous call, real operation will happen as soon as
+ *             timer service process this request.
  *
  * @param      instance  The pointer to FuriTimer instance
  * @param[in]  ticks     The interval in ticks
@@ -50,6 +56,9 @@ FuriStatus furi_timer_start(FuriTimer* instance, uint32_t ticks);
 FuriStatus furi_timer_restart(FuriTimer* instance, uint32_t ticks);
 
 /** Stop timer
+ *
+ * @warning    This is asynchronous call, real operation will happen as soon as
+ *             timer service process this request.
  *
  * @param      instance  The pointer to FuriTimer instance
  *
@@ -58,6 +67,10 @@ FuriStatus furi_timer_restart(FuriTimer* instance, uint32_t ticks);
 FuriStatus furi_timer_stop(FuriTimer* instance);
 
 /** Is timer running
+ *
+ * @warning    This cal may and will return obsolete timer state if timer
+ *             commands are still in the queue. Please read FreeRTOS timer
+ *             documentation first.
  *
  * @param      instance  The pointer to FuriTimer instance
  *
diff --git a/targets/f7/furi_hal/furi_hal_flash.c b/targets/f7/furi_hal/furi_hal_flash.c
index 284d48bf..7ac7a8bd 100644
--- a/targets/f7/furi_hal/furi_hal_flash.c
+++ b/targets/f7/furi_hal/furi_hal_flash.c
@@ -101,7 +101,7 @@ void furi_hal_flash_init() {
     // WRITE_REG(FLASH->SR, FLASH_SR_OPTVERR);
     /* Actually, reset all error flags on start */
     if(READ_BIT(FLASH->SR, FURI_HAL_FLASH_SR_ERRORS)) {
-        FURI_LOG_E(TAG, "FLASH->SR 0x%08lX", FLASH->SR);
+        FURI_LOG_W(TAG, "FLASH->SR 0x%08lX(Known ERRATA)", FLASH->SR);
         WRITE_REG(FLASH->SR, FURI_HAL_FLASH_SR_ERRORS);
     }
 }
diff --git a/targets/f7/furi_hal/furi_hal_power.c b/targets/f7/furi_hal/furi_hal_power.c
index 119dee81..9e3a70da 100644
--- a/targets/f7/furi_hal/furi_hal_power.c
+++ b/targets/f7/furi_hal/furi_hal_power.c
@@ -71,12 +71,37 @@ void furi_hal_power_init() {
 
     furi_hal_i2c_acquire(&furi_hal_i2c_handle_power);
     // Find and init gauge
-    if(bq27220_init(&furi_hal_i2c_handle_power)) {
-        furi_hal_power.gauge_ok = bq27220_apply_data_memory(
-            &furi_hal_i2c_handle_power, furi_hal_power_gauge_data_memory);
+    size_t retry = 2;
+    while(retry > 0) {
+        furi_hal_power.gauge_ok = bq27220_init(&furi_hal_i2c_handle_power);
+        if(furi_hal_power.gauge_ok) {
+            furi_hal_power.gauge_ok = bq27220_apply_data_memory(
+                &furi_hal_i2c_handle_power, furi_hal_power_gauge_data_memory);
+        }
+        if(furi_hal_power.gauge_ok) {
+            break;
+        } else {
+            // Normal startup time is 250ms
+            // But if we try to access gauge at that stage it will become unresponsive
+            // 2 seconds timeout needed to restart communication
+            furi_delay_us(2020202);
+        }
+        retry--;
     }
     // Find and init charger
-    furi_hal_power.charger_ok = bq25896_init(&furi_hal_i2c_handle_power);
+    retry = 2;
+    while(retry > 0) {
+        furi_hal_power.charger_ok = bq25896_init(&furi_hal_i2c_handle_power);
+        if(furi_hal_power.charger_ok) {
+            break;
+        } else {
+            // Most likely I2C communication error
+            // 2 seconds should be enough for all chips on the line to timeout
+            // Also timing out here is very abnormal
+            furi_delay_us(2020202);
+        }
+        retry--;
+    }
     furi_hal_i2c_release(&furi_hal_i2c_handle_power);
 
     FURI_LOG_I(TAG, "Init OK");
diff --git a/targets/f7/furi_hal/furi_hal_subghz.c b/targets/f7/furi_hal/furi_hal_subghz.c
index f7514635..a00ca7bf 100644
--- a/targets/f7/furi_hal/furi_hal_subghz.c
+++ b/targets/f7/furi_hal/furi_hal_subghz.c
@@ -4,6 +4,7 @@
 #include <furi_hal_version.h>
 #include <furi_hal_rtc.h>
 #include <furi_hal_spi.h>
+#include <furi_hal_cortex.h>
 #include <furi_hal_interrupt.h>
 #include <furi_hal_resources.h>
 #include <furi_hal_bus.h>
@@ -29,7 +30,7 @@ static uint32_t furi_hal_subghz_debug_gpio_buff[2];
 /** SubGhz state */
 typedef enum {
     SubGhzStateInit, /**< Init pending */
-
+    SubGhzStateBroken, /**< Chip power-on self test failed */
     SubGhzStateIdle, /**< Idle, energy save mode */
 
     SubGhzStateAsyncRx, /**< Async RX started */
@@ -69,46 +70,67 @@ const GpioPin* furi_hal_subghz_get_data_gpio() {
 
 void furi_hal_subghz_init() {
     furi_assert(furi_hal_subghz.state == SubGhzStateInit);
-    furi_hal_subghz.state = SubGhzStateIdle;
+    furi_hal_subghz.state = SubGhzStateBroken;
 
     furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
-
+    do {
 #ifdef FURI_HAL_SUBGHZ_TX_GPIO
-    furi_hal_gpio_init(&FURI_HAL_SUBGHZ_TX_GPIO, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
+        furi_hal_gpio_init(
+            &FURI_HAL_SUBGHZ_TX_GPIO, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
 #endif
 
-    // Reset
-    furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
-    cc1101_reset(&furi_hal_spi_bus_handle_subghz);
-    cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
+        // Reset
+        furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+        cc1101_reset(&furi_hal_spi_bus_handle_subghz);
+        cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
 
-    // Prepare GD0 for power on self test
-    furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeInput, GpioPullNo, GpioSpeedLow);
+        // Prepare GD0 for power on self test
+        furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeInput, GpioPullNo, GpioSpeedLow);
 
-    // GD0 low
-    cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW);
-    while(furi_hal_gpio_read(&gpio_cc1101_g0) != false)
-        ;
+        // GD0 low
+        FuriHalCortexTimer timeout = furi_hal_cortex_timer_get(10000);
+        cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW);
+        while(furi_hal_gpio_read(&gpio_cc1101_g0) != false &&
+              !furi_hal_cortex_timer_is_expired(timeout))
+            ;
 
-    // GD0 high
-    cc1101_write_reg(
-        &furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW | CC1101_IOCFG_INV);
-    while(furi_hal_gpio_read(&gpio_cc1101_g0) != true)
-        ;
+        if(furi_hal_gpio_read(&gpio_cc1101_g0) != false) {
+            break;
+        }
 
-    // Reset GD0 to floating state
-    cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
-    furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+        // GD0 high
+        timeout = furi_hal_cortex_timer_get(10000);
+        cc1101_write_reg(
+            &furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW | CC1101_IOCFG_INV);
+        while(furi_hal_gpio_read(&gpio_cc1101_g0) != true &&
+              !furi_hal_cortex_timer_is_expired(timeout))
+            ;
 
-    // RF switches
-    furi_hal_gpio_init(&gpio_rf_sw_0, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
-    cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW);
+        if(furi_hal_gpio_read(&gpio_cc1101_g0) != true) {
+            break;
+        }
 
-    // Go to sleep
-    cc1101_shutdown(&furi_hal_spi_bus_handle_subghz);
+        // Reset GD0 to floating state
+        cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHighImpedance);
+        furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+
+        // RF switches
+        furi_hal_gpio_init(&gpio_rf_sw_0, GpioModeOutputPushPull, GpioPullNo, GpioSpeedLow);
+        cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG2, CC1101IocfgHW);
+
+        // Go to sleep
+        cc1101_shutdown(&furi_hal_spi_bus_handle_subghz);
+
+        furi_hal_subghz.state = SubGhzStateIdle;
+    } while(false);
 
     furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
-    FURI_LOG_I(TAG, "Init OK");
+
+    if(furi_hal_subghz.state == SubGhzStateIdle) {
+        FURI_LOG_I(TAG, "Init OK");
+    } else {
+        FURI_LOG_E(TAG, "Init Fail");
+    }
 }
 
 void furi_hal_subghz_sleep() {