diff --git a/installing-on-termux.md b/installing-on-termux.md
index 3605cc6..c8d5fb6 100644
--- a/installing-on-termux.md
+++ b/installing-on-termux.md
@@ -1,5 +1,13 @@
 Termux apk here: https://f-droid.org/repo/com.termux_1020.apk  
 Termux:API apk if you want get notifications about updates of this code: https://f-droid.org/repo/com.termux.api_51.apk  
+  
+System requirements:
+Android 7+ and at least 500 Mb - 5 GB on storage, is official requirements from their wiki https://wiki.termux.com/wiki/FAQ#What_are_system_requirements  
+Personally I recommend also:  
+* 1.5 GB in storage is minimum for good perfomance, do not continue, if you have small storage, because it cause "no enough space" error
+* arm64 proccessor and 64-bit OS, because on S1S13AF7 smartphone (Redmi 6A) have perfomance issues with 32 bit system, but maybe if install PostmarketOS on this smartphone it will be better because is more native Linux system than java wrapped Termux... Maybe also MIUI firmware issues
+Anyway if you have low-end device, in step 1 when copying oneliner skip part with 'pkg update && pkg upgrade', but no any warranty, it can broke bot without upgrade Termux bootstrap packages. Also if your speed downloading updates very slow, press Ctrl+C, and try run `termux-change-repo` and select other region.  
+
 
 0. Optional step: allow permission on storage in Termux before start, after this, step 3-4 can be skipped
 1. Run termux and enter this oneliner: