Remove all SMS from ZTE MF283V modem. This modem has tendency to overflow after you cant view SMS in UI. Tested on Russian Tele 2 version.

remove_sms.py

import requests
import json
import base64

url = 'http://192.168.0.1/goform/goform_get_cmd_process?isTest=false&cmd=sms_data_total&page=0&data_per_page=500&mem_store=1&tags=10&order_by=order+by+id+desc'

s = requests.Session()
s.headers.update({'Host': '192.168.0.1'})
s.headers.update({'Referer': 'http://192.168.0.1/index.html'})
r = s.get(url)
t = r.text
j = json.loads(t, strict=False)

for m in j['messages']:
    print(m['id'] + " (" + m['number'] + "):")
    print(m['content'])
    print("\n")
 
    id = m['id']
    url = 'http://192.168.0.1/goform/goform_set_cmd_process'
    payload = {'isTest': 'false', 'goformId': 'DELETE_SMS', 'msg_id': id, 'notCallback': 'true'}
    s.post(url, data=payload)