mbimcli: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/mbimcli - from package: libmbim-utils

You may install the required package with command apt-get install {package}

Error in other languages:
mbimcli: bevel nie gevind nie
mbimcli: comandă negăsită
mbimcli: comando não encontrado
mbimcli: commande introuvable
mbimcli: command not found
mbimcli: käsku ei ole
mbimcli: không tìm thấy lệnh
mbimcli: komanda nerasta
mbimcli: Kommando nicht gefunden.
mbimcli: kommandot finns inte
mbimcli: komut yok
mbimcli: nie znaleziono polecenia
mbimcli: níor aimsíodh an t-ordú
mbimcli: no se encontró la orden
mbimcli: no s'ha trobat l'ordre
mbimcli: opdracht niet gevonden
mbimcli: parancs nem található
mbimcli: perintah tidak ditemukan
mbimcli: príkaz nenájdený
mbimcli: příkaz nenalezen
mbimcli: команда не найдена
mbimcli: командата не е открита
mbimcli: 命令找不到
mbimcli: コマンドが見つかりません