Slow internet speed intel centrino n 100

I can get about 5Mbps. Meanwhile on Windows I get 50Mbps. I tried it on Ubuntu, xubuntu, kubuntu 18.04.

sudo lshw -C network :

  *-network
       description: Wireless interface
       product: Centrino Wireless-N 100
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlp3s0
       version: 00
       serial: 78:92:9c:09:59:36
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.18.0-15-generic firmware=39.31.5.1 build 32895 ip=192.168.0.23 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:28 memory:de200000-de201fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: enp4s0
       version: 06
       serial: f4:6d:04:24:b9:42
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168e-2.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:17 ioport:a000(size=256) memory:d2104000-d2104fff memory:d2100000-d2103fff

lsb_release -a :

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic

 uname -a
Linux portatil 4.18.0-15-generic #16~18.04.1-Ubuntu SMP Thu Feb 7 14:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

sudo iwlist scan | egrep -i 'ssid|chan'
lo Interface doesn't support scanning.

enp4s0 Interface doesn't support scanning.

                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"vodafone37F1"
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"MOVISTAR_B7AA"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"vodafoneCD63"